Heap-based buffer overflow in zlib - CVE-2023-6992
Published: March 31, 2025
Vulnerability identifier: #VU106260
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2023-6992
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cloudflare
Affected software:
zlib
zlib
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error when handling compressed data in deflate.c. A remote attacker can pass specially crafted input to the application, trigger a heap-based buffer overflow and perform a denial of service (DoS) attack.
How to mitigate CVE-2023-6992
Install update from vendor's website.