CVE-2017-7269: Microsoft Windows Server Buffer Overflow Vulnerability

Vulnerability summary

CVE-2017-7269 is a high (CVSS 10.0) Classic Buffer Overflow vulnerability in Microsoft Internet Information Services (IIS). It is known to be exploited: CISA lists it, first on 03-11-2021. EPSS estimates a 99.82% chance of exploitation in the next 30 days, higher than 99.9% of scored vulnerabilities. 6 public exploits are recorded.

Timeline

1. 27-03-2017
   PublishedVulnerability first disclosed.
2. 03-11-2021
   Added to CISA KEVMicrosoft Windows Server Buffer Overflow Vulnerability
3. 03-05-2022
   CISA remediation dueApply updates per vendor instructions.
4. 21-10-2025
   Last modifiedVulnerability information updated.

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.

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.