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Microsoft Patch Tuesday November 2022: Exchange ProxyNotShell RCE, JScript9, MoTW, OpenSSL, Edge, CNG, Print Spooler
Hello everyone! This episode will be about Microsoft Patch Tuesday for November 2022, including vulnerabilities that were added between October and November Patch Tuesdays. As usual, I use my open source Vulristics project to create the report. Alternative video link (for Russia): https://vk.com/video-149273431_456239107 The most important news of this Patch Tuesday was a release of patches […]
Hello everyone! This episode will be about Microsoft Patch Tuesday for November 2022, including vulnerabilities that were added between October and November Patch Tuesdays. As usual, I use my open source Vulristics project to create the report.
Alternative video link (for Russia): https://vk.com/video-149273431_456239107
The most important news of this Patch Tuesday was a release of patches for ProxyNotShell Remote Code Execution – Microsoft Exchange (CVE-2022-41040, CVE-2022-41082) mentioned in the previous episode. These vulnerabilities became public on September 28, and updates for this vulnerability did not appear until November 8. Microsoft could have acted more quickly. But it’s good that the problem with these actively exploited vulnerabilities is finally solved.
But besides ProxyNotShell, this November Patch Tuesday had a lot of interesting vulnerabilities. Let’s take a look.
$ cat comments_links.txt
Qualys|November 2022 Patch Tuesday|https://blog.qualys.com/vulnerabilities-threat-research/2022/11/08/november-2022-patch-tuesday
ZDI|THE NOVEMBER 2022 SECURITY UPDATE REVIEW|https://www.zerodayinitiative.com/blog/2022/11/8/the-november-2022-security-update-review
$ python3.8 process_classify_ms_products.py # Automated classifier for Microsoft products
$ python3.8 vulristics.py --report-type "ms_patch_tuesday_extended" --mspt-year 2022 --mspt-month "November" --mspt-comments-links-path "comments_links.txt" --rewrite-flag "True"
...
Creating Patch Tuesday profile...
MS PT Year: 2022
MS PT Month: November
MS PT Date: 2022-11-08
MS PT CVEs found: 66
Ext MS PT Date from: 2022-10-12
Ext MS PT Date to: 2022-11-07
Ext MS PT CVEs found: 17
ALL MS PT CVEs: 83
...
All vulnerabilities: 82
Urgent: 1
Critical: 6
High: 19
Medium: 56
Low: 0
Let’s start with vulnerabilities for which there is an exploit or signs of exploitation in the wild.
- Remote Code Execution – Windows Scripting Languages (CVE-2022-41128). Critical RCE affecting the JScript9 scripting language (Microsoft’s legacy JavaScript dialect, used by their Internet Explorer browser). It has been exploited in the wild and successful exploitation requires a user with an affected version of Windows to visit a malicious, attacker controlled server. In doing so, the attackers would get their code to execute on an affected system at the level of the logged-on user. The existence of a public exploit is mentioned in Microsoft CVSS Temporal Score (Functional Exploit).
- Security Feature Bypass – Windows Mark of the Web (CVE-2022-41049, CVE-2022-41091). MoTW is a security feature used to tag files downloaded from the internet and prevent them from performing certain actions. Files flagged with MoTW would be opened in Protected View in Microsoft Office — prompting users with a security warning banner asking them to confirm the document is trusted by selecting Enable content. A malicious actor could craft a file that could bypass MoTW “resulting in a limited loss of integrity and availability of security features such as Protected View.” The existence of a public exploit for CVE-2022-41049 is mentioned in Microsoft CVSS Temporal Score (Functional Exploit). Exploitation in the wild is mentioned on Vulners (cisa_kev object), AttackerKB and Microsoft websites.
- Remote Code Execution – OpenSSL (CVE-2022-3602). The vulnerability assigned to this CVE is in OpenSSL Software which is consumed by the Microsoft products listed in the Security Updates table and is known to be affected: Azure SDK for C++,
vcpkg, Microsoft Azure Kubernetes Service. The existence of a public exploit is mentioned on Vulners website. - Memory Corruption – Microsoft Edge (CVE-2022-3723). This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Exploitation in the wild is mentioned on Vulners (cisa_kev object) and AttackerKB websites.
- Elevation of Privilege – Windows CNG Key Isolation Service (CVE-2022-41125). An attacker can abuse this bug to run their code with SYSTEM privileges. They would need to be authenticated, which is why bugs like these are often paired with some form of remote code execution exploit. Exploitation in the wild is mentioned on Vulners (cisa_kev object), AttackerKB and Microsoft websites
- Elevation of Privilege – Windows Print Spooler (CVE-2022-41073). The legacy of PrintNightmare continues as threat actors continue to mine the vast attack surface that is the Windows Print Spooler. While we’ve seen plenty of other patches since PrintNightmare, this one is listed as being in the wild. Exploitation in the wild is mentioned on Vulners (cisa_kev object), AttackerKB, Microsoft websites.
Now let’s look at vulnerabilities for which there are no public exploits or signs of exploitation in the wild, but the descriptions of which are interesting enough to pay attention to.
- Elevation of Privilege – Kerberos (CVE-2022-37966). Successful exploitation of this vulnerability requires an attacker to gather information specific to the environment of the targeted component. An attacker who successfully exploited this vulnerability could gain administrator privileges. An unauthenticated attacker could conduct an attack that could leverage cryptographic protocol vulnerabilities in RFC 4757 (Kerberos encryption type RC4-HMAC-MD5) and MS-PAC (Privilege Attribute Certificate Data Structure specification) to bypass security features in a Windows AD environment. Vulnerability Exploitability Assessment: Exploitation More Likely. Also pay attention to Elevation of Privilege – Kerberos (CVE-2022-37967).
- Elevation of Privilege – Microsoft Exchange (CVE-2022-41080). The technical details are unknown, and an exploit is not publicly available. Applying a patch is able to eliminate this problem.
- Elevation of Privilege – Netlogon RPC (CVE-2022-38023). Exploitability Assessment: Exploitation More Likely.
Full Vulristics report: ms_patch_tuesday_november2022
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<p><span><span><span><span><span><span>On November 8th, 2022, Microsoft released a series of security updates for various Windows operating systems to fix two security issues:</span></span></span></span></span></span></p> <ul> <li aria-level="1"><a href="https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-37966"&
<p><span><span><span><span><span><span>On November 8th, 2022, Microsoft released a series of security updates for various Windows operating systems to fix two security issues:</span></span></span></span></span></span></p> <ul> <li aria-level="1"><a href="https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-37966"&
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Windows CNG Key Isolation Service Elevation of Privilege Vulnerability
Windows Print Spooler Elevation of Privilege Vulnerability.
Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability.
Windows Kerberos Elevation of Privilege Vulnerability
Windows Scripting Languages Remote Code Execution Vulnerability. This CVE ID is unique from CVE-2022-41118.
Windows Scripting Languages Remote Code Execution Vulnerability
Windows Kerberos Elevation of Privilege Vulnerability.
By Deeba Ahmed Microsoft has urged Windows Administrators to install the updates urgently so make sure you have the latest patches installed! This is a post from HackRead.com Read the original post: Microsoft Issues Patches to Fix 6 Active 0-Day Windows Vulnerabilities
By Deeba Ahmed Microsoft has urged Windows Administrators to install the updates urgently so make sure you have the latest patches installed! This is a post from HackRead.com Read the original post: Microsoft Issues Patches to Fix 6 Active 0-Day Windows Vulnerabilities
By Deeba Ahmed Microsoft has urged Windows Administrators to install the updates urgently so make sure you have the latest patches installed! This is a post from HackRead.com Read the original post: Microsoft Issues Patches to Fix 6 Active 0-Day Windows Vulnerabilities
By Deeba Ahmed Microsoft has urged Windows Administrators to install the updates urgently so make sure you have the latest patches installed! This is a post from HackRead.com Read the original post: Microsoft Issues Patches to Fix 6 Active 0-Day Windows Vulnerabilities
By Deeba Ahmed Microsoft has urged Windows Administrators to install the updates urgently so make sure you have the latest patches installed! This is a post from HackRead.com Read the original post: Microsoft Issues Patches to Fix 6 Active 0-Day Windows Vulnerabilities
By Deeba Ahmed Microsoft has urged Windows Administrators to install the updates urgently so make sure you have the latest patches installed! This is a post from HackRead.com Read the original post: Microsoft Issues Patches to Fix 6 Active 0-Day Windows Vulnerabilities
By Deeba Ahmed Microsoft has urged Windows Administrators to install the updates urgently so make sure you have the latest patches installed! This is a post from HackRead.com Read the original post: Microsoft Issues Patches to Fix 6 Active 0-Day Windows Vulnerabilities
By Deeba Ahmed Microsoft has urged Windows Administrators to install the updates urgently so make sure you have the latest patches installed! This is a post from HackRead.com Read the original post: Microsoft Issues Patches to Fix 6 Active 0-Day Windows Vulnerabilities
Microsoft's latest round of monthly security updates has been released with fixes for 68 vulnerabilities spanning its software portfolio, including patches for six actively exploited zero-days. 12 of the issues are rated Critical, two are rated High, and 55 are rated Important in severity. This also includes the weaknesses that were closed out by OpenSSL the previous week. Also separately
Microsoft's latest round of monthly security updates has been released with fixes for 68 vulnerabilities spanning its software portfolio, including patches for six actively exploited zero-days. 12 of the issues are rated Critical, two are rated High, and 55 are rated Important in severity. This also includes the weaknesses that were closed out by OpenSSL the previous week. Also separately
Microsoft's latest round of monthly security updates has been released with fixes for 68 vulnerabilities spanning its software portfolio, including patches for six actively exploited zero-days. 12 of the issues are rated Critical, two are rated High, and 55 are rated Important in severity. This also includes the weaknesses that were closed out by OpenSSL the previous week. Also separately
Microsoft's latest round of monthly security updates has been released with fixes for 68 vulnerabilities spanning its software portfolio, including patches for six actively exploited zero-days. 12 of the issues are rated Critical, two are rated High, and 55 are rated Important in severity. This also includes the weaknesses that were closed out by OpenSSL the previous week. Also separately
Microsoft's latest round of monthly security updates has been released with fixes for 68 vulnerabilities spanning its software portfolio, including patches for six actively exploited zero-days. 12 of the issues are rated Critical, two are rated High, and 55 are rated Important in severity. This also includes the weaknesses that were closed out by OpenSSL the previous week. Also separately
Microsoft's latest round of monthly security updates has been released with fixes for 68 vulnerabilities spanning its software portfolio, including patches for six actively exploited zero-days. 12 of the issues are rated Critical, two are rated High, and 55 are rated Important in severity. This also includes the weaknesses that were closed out by OpenSSL the previous week. Also separately
Microsoft's latest round of monthly security updates has been released with fixes for 68 vulnerabilities spanning its software portfolio, including patches for six actively exploited zero-days. 12 of the issues are rated Critical, two are rated High, and 55 are rated Important in severity. This also includes the weaknesses that were closed out by OpenSSL the previous week. Also separately
Microsoft's latest round of monthly security updates has been released with fixes for 68 vulnerabilities spanning its software portfolio, including patches for six actively exploited zero-days. 12 of the issues are rated Critical, two are rated High, and 55 are rated Important in severity. This also includes the weaknesses that were closed out by OpenSSL the previous week. Also separately
Microsoft's latest round of monthly security updates has been released with fixes for 68 vulnerabilities spanning its software portfolio, including patches for six actively exploited zero-days. 12 of the issues are rated Critical, two are rated High, and 55 are rated Important in severity. This also includes the weaknesses that were closed out by OpenSSL the previous week. Also separately
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Let's face it: Having “2022 election” in the headline above is probably the only reason anyone might read this story today. Still, while most of us here in the United States are anxiously awaiting the results of how well we've patched our Democracy, it seems fitting that Microsoft Corp. today released gobs of security patches for its ubiquitous Windows operating systems. November's patch batch includes fixes for a whopping six zero-day security vulnerabilities that miscreants and malware are already exploiting in the wild.
Let's face it: Having “2022 election” in the headline above is probably the only reason anyone might read this story today. Still, while most of us here in the United States are anxiously awaiting the results of how well we've patched our Democracy, it seems fitting that Microsoft Corp. today released gobs of security patches for its ubiquitous Windows operating systems. November's patch batch includes fixes for a whopping six zero-day security vulnerabilities that miscreants and malware are already exploiting in the wild.
Let's face it: Having “2022 election” in the headline above is probably the only reason anyone might read this story today. Still, while most of us here in the United States are anxiously awaiting the results of how well we've patched our Democracy, it seems fitting that Microsoft Corp. today released gobs of security patches for its ubiquitous Windows operating systems. November's patch batch includes fixes for a whopping six zero-day security vulnerabilities that miscreants and malware are already exploiting in the wild.
Let's face it: Having “2022 election” in the headline above is probably the only reason anyone might read this story today. Still, while most of us here in the United States are anxiously awaiting the results of how well we've patched our Democracy, it seems fitting that Microsoft Corp. today released gobs of security patches for its ubiquitous Windows operating systems. November's patch batch includes fixes for a whopping six zero-day security vulnerabilities that miscreants and malware are already exploiting in the wild.
Long-awaited security fixes for ProxyNotShell and Mark of the Web bypasses are part of a glut of actively exploited zero-day vulnerabilities and other critical flaws that admins need to prioritize in the coming hours.
Long-awaited security fixes for ProxyNotShell and Mark of the Web bypasses are part of a glut of actively exploited zero-day vulnerabilities and other critical flaws that admins need to prioritize in the coming hours.
Long-awaited security fixes for ProxyNotShell and Mark of the Web bypasses are part of a glut of actively exploited zero-day vulnerabilities and other critical flaws that admins need to prioritize in the coming hours.
Long-awaited security fixes for ProxyNotShell and Mark of the Web bypasses are part of a glut of actively exploited zero-day vulnerabilities and other critical flaws that admins need to prioritize in the coming hours.
Long-awaited security fixes for ProxyNotShell and Mark of the Web bypasses are part of a glut of actively exploited zero-day vulnerabilities and other critical flaws that admins need to prioritize in the coming hours.
Long-awaited security fixes for ProxyNotShell and Mark of the Web bypasses are part of a glut of actively exploited zero-day vulnerabilities and other critical flaws that admins need to prioritize in the coming hours.
Long-awaited security fixes for ProxyNotShell and Mark of the Web bypasses are part of a glut of actively exploited zero-day vulnerabilities and other critical flaws that admins need to prioritize in the coming hours.
Long-awaited security fixes for ProxyNotShell and Mark of the Web bypasses are part of a glut of actively exploited zero-day vulnerabilities and other critical flaws that admins need to prioritize in the coming hours.
Microsoft released its monthly security update on Tuesday, disclosing 62 vulnerabilities. Of these vulnerabilities, 8 are classified as “Critical” and the rest are classified as “Important.”
Microsoft released its monthly security update on Tuesday, disclosing 62 vulnerabilities. Of these vulnerabilities, 8 are classified as “Critical” and the rest are classified as “Important.”
Microsoft released its monthly security update on Tuesday, disclosing 62 vulnerabilities. Of these vulnerabilities, 8 are classified as “Critical” and the rest are classified as “Important.”
Microsoft released its monthly security update on Tuesday, disclosing 62 vulnerabilities. Of these vulnerabilities, 8 are classified as “Critical” and the rest are classified as “Important.”
Microsoft released its monthly security update on Tuesday, disclosing 62 vulnerabilities. Of these vulnerabilities, 8 are classified as “Critical” and the rest are classified as “Important.”
Microsoft released its monthly security update on Tuesday, disclosing 62 vulnerabilities. Of these vulnerabilities, 8 are classified as “Critical” and the rest are classified as “Important.”
Red Hat Security Advisory 2022-7384-01 - The ubi9/openssl image provides provides an openssl command-line tool for using the various functions of the OpenSSL crypto library. Issues addressed include a buffer overflow vulnerability.
An update for openssl-container is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-3602: OpenSSL: X.509 Email Address Buffer Overflow
Gentoo Linux Security Advisory 202211-1 - Multiple vulnerabilities have been discovered in OpenSSL, the worst of which could result in remote code execution. Versions less than 3.0.7:0/3 are affected.
**Why is this OpenSSL Software Foundation CVE included in the Security Update Guide?** The vulnerability assigned to this CVE is in OpenSSL Software which is consumed by the Microsoft products listed in the Security Updates table and are known to be affected. It is being documented in the Security Update Guide to announce that the latest builds of these products are no longer vulnerable. Please see Security Update Guide Supports CVEs Assigned by Industry Partners for more information.
**Why is this OpenSSL Software Foundation CVE included in the Security Update Guide?** The vulnerability assigned to this CVE is in OpenSSL Software which is consumed by the Microsoft products listed in the Security Updates table and are known to be affected. It is being documented in the Security Update Guide to announce that the latest builds of these products are no longer vulnerable. Please see Security Update Guide Supports CVEs Assigned by Industry Partners for more information.
Type confusion in V8 in Google Chrome prior to 107.0.5304.87 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chrome security severity: High)
Punycode-related flaw fails the logo test
An update for openssl is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-3602: OpenSSL: X.509 Email Address Buffer Overflow * CVE-2022-3786: OpenSSL: X.509 Email Address Variable Length Buffer Overflow
A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed the malicious certificate or for the application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address to overflow four attacker-controlled bytes on the stack. This buffer overflow could result in a crash (causing a denial of service) or potentially remote code execution. Many platforms implement stack overflow protections which would mitigate against the risk of remote code execution. The risk may be further mitigated based on stack layout for any given platform/compiler. Pre-announcements of CVE-2022-3602 described this issue as CRITICAL. Further analysis based on some of the mitigating factors described above have led this to be downgraded to HIGH. Users are still encouraged to up...
A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed the malicious certificate or for the application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address to overflow four attacker-controlled bytes on the stack. This buffer overflow could result in a crash (causing a denial of service) or potentially remote code execution. Many platforms implement stack overflow protections which would mitigate against the risk of remote code execution. The risk may be further mitigated based on stack layout for any given platform/compiler. Pre-announcements of CVE-2022-3602 described this issue as CRITICAL. Further analysis based on some of the mitigating factors described above have led this to be downgraded to HIGH. Users are still encouraged to ...
The OpenSSL project has rolled out fixes to contain two high-severity flaws in its widely used cryptography library that could result in a denial-of-service (DoS) and remote code execution. The issues, tracked as CVE-2022-3602 and CVE-2022-3786, have been described as buffer overrun vulnerabilities that can be triggered during X.509 certificate verification by supplying a specially-crafted email
Categories: Exploits and vulnerabilities Categories: News Google has issued an update for Chrome to fix an issue in the V8 JavaScript engine (Read more...) The post A Chrome fix for an in-the-wild exploit is out—Check your version appeared first on Malwarebytes Labs.
With scant details attached, Google Chrome seeks to shore up yet another exploited zero-day vulnerability.
Google on Thursday rolled out emergency fixes to contain an actively exploited zero-day flaw in its Chrome web browser. The vulnerability, tracked as CVE-2022-3723, has been described as a type confusion flaw in the V8 JavaScript engine. Security researchers Jan Vojtěšek, Milánek, and Przemek Gmerek of Avast have been credited with reporting the flaw on October 25, 2022. "Google is aware of
Microsoft on Friday disclosed it has made more improvements to the mitigation method offered as a means to prevent exploitation attempts against the newly disclosed unpatched security flaws in Exchange Server. To that end, the tech giant has revised the blocking rule in IIS Manager from ".*autodiscover\.json.*Powershell.*" to "(?=.*autodiscover\.json)(?=.*powershell)." The list of
Microsoft on Friday disclosed it has made more improvements to the mitigation method offered as a means to prevent exploitation attempts against the newly disclosed unpatched security flaws in Exchange Server. To that end, the tech giant has revised the blocking rule in IIS Manager from ".*autodiscover\.json.*Powershell.*" to "(?=.*autodiscover\.json)(?=.*powershell)." The list of
By Jon Munshaw. Welcome to this week’s edition of the Threat Source newsletter. As I wrote about last week, I’ve been diving a lot into apps’ privacy policies recently. And I was recently made aware of a new type of app I never knew existed — family trackers. There are countless mobile apps for parents to track their children or other family members based on their location, phone usage, and even driving speed. As an anxious soon-to-be-parent, this sounds intriguing to me — it’d be a supped-up version of Find my Friends on Apple devices so I’d never have to ask my teenager (granted, I’m many years away from being at that stage of my life) when they were coming home or where they were. Just as with all other types of mobile apps, there are pitfalls, though. Life360, one of the most popular of these types of apps and even tells users what their maximum driving speed was on a given trip, was found in December 2021 to be selling precise location data on its users, potentia...
By Jon Munshaw. Welcome to this week’s edition of the Threat Source newsletter. As I wrote about last week, I’ve been diving a lot into apps’ privacy policies recently. And I was recently made aware of a new type of app I never knew existed — family trackers. There are countless mobile apps for parents to track their children or other family members based on their location, phone usage, and even driving speed. As an anxious soon-to-be-parent, this sounds intriguing to me — it’d be a supped-up version of Find my Friends on Apple devices so I’d never have to ask my teenager (granted, I’m many years away from being at that stage of my life) when they were coming home or where they were. Just as with all other types of mobile apps, there are pitfalls, though. Life360, one of the most popular of these types of apps and even tells users what their maximum driving speed was on a given trip, was found in December 2021 to be selling precise location data on its users, potentia...
Nicknamed ProxyNotShell, a new exploit used in the wild takes advantage of the recently published Microsoft Server-Side Request Forgery (SSRF) vulnerability CVE-2022-41040 and a second vulnerability, CVE-2022-41082 that allows Remote Code Execution (RCE) when PowerShell is available to unidentified attackers. Based on ProxyShell, this new zero-day abuse risk leverage a chained attack similar to
Nicknamed ProxyNotShell, a new exploit used in the wild takes advantage of the recently published Microsoft Server-Side Request Forgery (SSRF) vulnerability CVE-2022-41040 and a second vulnerability, CVE-2022-41082 that allows Remote Code Execution (RCE) when PowerShell is available to unidentified attackers. Based on ProxyShell, this new zero-day abuse risk leverage a chained attack similar to
Microsoft Exchange Server Elevation of Privilege Vulnerability.
Microsoft Exchange Server Remote Code Execution Vulnerability.
Microsoft on Friday disclosed that a single activity group in August 2022 achieved initial access and breached Exchange servers by chaining the two newly disclosed zero-day flaws in a limited set of attacks aimed at less than 10 organizations globally. "These attacks installed the Chopper web shell to facilitate hands-on-keyboard access, which the attackers used to perform Active Directory
Microsoft on Friday disclosed that a single activity group in August 2022 achieved initial access and breached Exchange servers by chaining the two newly disclosed zero-day flaws in a limited set of attacks aimed at less than 10 organizations globally. "These attacks installed the Chopper web shell to facilitate hands-on-keyboard access, which the attackers used to perform Active Directory
While organizations wait for an official patch for the two zero-day flaws in Microsoft Exchange, they should scan their networks for signs of exploitation and apply these mitigations.
While organizations wait for an official patch for the two zero-day flaws in Microsoft Exchange, they should scan their networks for signs of exploitation and apply these mitigations.
Cisco Talos has released new coverage to detect and prevent the exploitation of two recently disclosed vulnerabilities collectively referred to as "ProxyNotShell," affecting Microsoft Exchange Servers 2013, 2016 and 2019. One of these vulnerabilities could allow an attacker to execute remote code on the targeted server. Limited exploitation of these vulnerabilities in the wild has been reported. CVE-2022-41040 is a Server Side Request Forgery (SSRF) vulnerability, while CVE-2022-41082 enables Remote Code Execution (RCE) when PowerShell is accessible to the attackers. While no fixes or patches are available yet, Microsoft has provided mitigations for on-premises Microsoft Exchange users on Sept. 29, 2022. Even organizations that use Exchange Online may still be affected if they run a hybrid server. Cisco Talos is closely monitoring the recent reports of exploitation attempts against these vulnerabilities and strongly recommends users implement mitigation steps while waiting for securit...
Cisco Talos has released new coverage to detect and prevent the exploitation of two recently disclosed vulnerabilities collectively referred to as "ProxyNotShell," affecting Microsoft Exchange Servers 2013, 2016 and 2019. One of these vulnerabilities could allow an attacker to execute remote code on the targeted server. Limited exploitation of these vulnerabilities in the wild has been reported. CVE-2022-41040 is a Server Side Request Forgery (SSRF) vulnerability, while CVE-2022-41082 enables Remote Code Execution (RCE) when PowerShell is accessible to the attackers. While no fixes or patches are available yet, Microsoft has provided mitigations for on-premises Microsoft Exchange users on Sept. 29, 2022. Even organizations that use Exchange Online may still be affected if they run a hybrid server. Cisco Talos is closely monitoring the recent reports of exploitation attempts against these vulnerabilities and strongly recommends users implement mitigation steps while waiting for securit...
Even organizations that use Exchange Online may still be affected if they run a hybrid server.
By Deeba Ahmed The latest attack against Exchange servers utilizes at least two new flaws (CVE-2022-41040, CVE-2022-41082) that have been assigned CVSS scores of 6.3 and 8.8. This is a post from HackRead.com Read the original post: Microsoft Confirms Two 0-Days Being Exploited Against Exchange Servers
By Deeba Ahmed The latest attack against Exchange servers utilizes at least two new flaws (CVE-2022-41040, CVE-2022-41082) that have been assigned CVSS scores of 6.3 and 8.8. This is a post from HackRead.com Read the original post: Microsoft Confirms Two 0-Days Being Exploited Against Exchange Servers
The "ProxyNotShell" security vulnerabilities can be chained for remote code execution and total takeover of corporate email platforms.
The "ProxyNotShell" security vulnerabilities can be chained for remote code execution and total takeover of corporate email platforms.