CVE-2017-7523: cygwin Out-of-bounds Write

Vulnerability summary

CVE-2017-7523 is a high (CVSS 7.5) Out-of-bounds Write vulnerability in cygwin. EPSS estimates a 2.75% chance of exploitation in the next 30 days, higher than 86% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 21-07-2017
   PublishedVulnerability first disclosed.
2. 16-09-2024
   Last modifiedVulnerability information updated.

Description

Cygwin versions 1.7.2 up to and including 1.8.0 are vulnerable to buffer overflow vulnerability in wcsxfrm/wcsxfrm_l functions resulting into denial-of-service by crashing the process or potential hijack of the process running with administrative privileges triggered by specially crafted input string.

• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.