CVE-2023-6992

Medium

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.

SeverityMedium
CVSS4.0
Exploit probability—
ProductCloudflare Zlib
PublishedJan 4, 2024
First seenJan 4, 2024

How to fix

Update
  • cloudflare zlib2023-11-16 or later

Affected products

ProductAffected versionsFixed in
cloudflare zlibv < 2023-11-162023-11-16

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