CVSS 3.0
7.5 highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2018-1000027
The Squid Software Foundation Squid HTTP Caching Proxy version prior to version 4.0.23 contains a NULL Pointer Dereference vulnerability in HTTP Response X-Forwarded-For header processing that can result in Denial of Service to all clients of the proxy. This attack appear to be exploitable via Remote HTTP server responding with an X-Forwarded-For header to certain types of HTTP request. This vulnerability appears to have been fixed in 4.0.23 and later.
Severity
- EPSS
- 13% chance of exploitation in the next 30 days; higher than 96% of CVEs (scores of 2026-10-31)
- CWE
- CWE-476
- Published
- Modified
- Record from
- the NVD, synced
Affected
- canonical:ubuntu_linux
- debian:debian_linux
- squid-cache:squid
References
- http://www.squid-cache.org/Advisories/SQUID-2018_2.txt
- http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2018_2.patch
- http://www.squid-cache.org/Versions/v4/changesets/SQUID-2018_2.patch
- https://github.com/squid-cache/squid/pull/129/files
- https://lists.debian.org/debian-lts-announce/2018/02/msg00001.html