VULNERABILITY INTELLIGENCE

CVE-2023-6992

CVSS score4 MEDIUM
EPSS probability0.24%
CISA KEVNot currently listed
Published2024-01-04
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

Description

Cloudflare version of zlib library was found to be vulnerable to memory corruption issues affecting the deflation algorithm implementation (deflate.c). The issues resulted from improper input validation and heap-based buffer overflow. A local attacker could exploit the problem during compression using a crafted malicious file potentially leading to denial of service of the software. Patches: The issue has been patched in commit 8352d10 https://github.com/cloudflare/zlib/commit/8352d108c05db1bdc5ac3bdf834dad641694c13c . The upstream repository is not affected.

Weakness classification

  • cna@cloudflare.com: CWE-20
  • nvd@nist.gov: CWE-787

Primary references