Microsoft Exchange Server Remote Code Execution Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-09-30
• Known to be used in ransomware campaigns
• EPSS: 100% chance of exploitation in the next 30 days (higher than 100% of CVEs)

[ Description ]Official description

Microsoft Exchange Server Remote Code Execution Vulnerability

CISA: Microsoft Exchange Server contains an unspecified vulnerability that allows for authenticated remote code execution. Dubbed "ProxyNotShell," this vulnerability is chainable with CVE-2022-41040 which allows for the remote code execution.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 21 Oct 2022): Apply updates per vendor instructions.

• Patch on portal.msrc.microsoft.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ References ]References

• msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41082Vendor Advisory
• packetstormsecurity.com/files/170066/Microsoft-Exchange-ProxyNotShell-Remote-Code-Execu…ExploitThird Party AdvisoryVDB Entry
• portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-41082PatchVendor Advisory
• www.kb.cert.org/vuls/id/915563Third Party AdvisoryUS Government Resource
• www.secpod.com/blog/microsoft-november-2022-patch-tuesday-patches-65-vulnerabilities-in…Third Party Advisory
• www.vicarius.io/vsociety/posts/cve-2022-41082-microsoft-exchange-server-remote-code-exe…Third Party Advisory
• www.vicarius.io/vsociety/posts/cve-2022-41082-microsoft-exchange-server-remote-code-exe…Third Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource