Microsoft Windows Server Buffer Overflow Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2021-11-03
• EPSS: 100% chance of exploitation in the next 30 days (higher than 100% of CVEs)
• Critical severity: CVSS 9.8

[ Description ]Official description

Buffer overflow in the ScStoragePathFromUrl function in the WebDAV service in Internet Information Services (IIS) 6.0 in Microsoft Windows Server 2003 R2 allows remote attackers to execute arbitrary code via a long header beginning with "If: <http://" in a PROPFIND request, as exploited in the wild in July or August 2016.

CISA: Microsoft Windows Server 2003 R2 contains a buffer overflow vulnerability in Internet Information Services (IIS) 6.0 which allows remote attackers to execute code via a long header beginning with "If: <http://" in a PROPFIND request.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 3 May 2022): Apply updates per vendor instructions.

• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
• Patch on support.microsoft.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ References ]References

• www.securityfocus.com/bid/97127Broken LinkThird Party AdvisoryVDB Entry
• www.securitytracker.com/id/1038168Broken LinkThird Party AdvisoryVDB Entry
• 0patch.blogspot.com/2017/03/0patching-immortal-cve-2017-7269.htmlExploitThird Party Advisory
• github.com/danigargu/explodingcanExploit
• github.com/edwardz246003/IIS_exploitBroken LinkThird Party Advisory
• github.com/rapid7/metasploit-framework/pull/8162Issue TrackingPatch
• medium.com/%40iraklis/number-of-internet-facing-vulnerable-iis-6-0-to-cve-2017-7269-8bd…Exploit
• support.microsoft.com/en-us/help/3197835/description-of-the-security-update-for-windows…Broken LinkPatchVendor Advisory
• www.exploit-db.com/exploits/41738ExploitThird Party AdvisoryVDB Entry
• www.exploit-db.com/exploits/41992ExploitThird Party AdvisoryVDB Entry
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource