CVE-2017-7269

CVE-2017-7269 is a critical-severity (CVSS 9.8) vulnerability in Microsoft Internet Information Services (IIS). CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 3, 2022. CISA does not currently list it as used in ransomware campaigns. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

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.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

• http://www.securityfocus.com/bid/97127
• http://www.securitytracker.com/id/1038168
• https://0patch.blogspot.com/2017/03/0patching-immortal-cve-2017-7269.html
• https://github.com/danigargu/explodingcan
• https://github.com/edwardz246003/IIS_exploit
• https://github.com/rapid7/metasploit-framework/pull/8162
• https://medium.com/%40iraklis/number-of-internet-facing-vulnerable-iis-6-0-to-cve-2017-7269-8bd153ef5812
• https://support.microsoft.com/en-us/help/3197835/description-of-the-security-update-for-windows-xp-and-windows-server