CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2019-18676
High (7.5). EPSS 9.2% chance of exploitation in the next 30 days.
An issue was discovered in Squid 3.x and 4.x through 4.8. Due to incorrect input validation, there is a heap-based buffer overflow that can result in Denial of Service to all clients using the proxy. Severity is high due to this vulnerability occurring before normal security checks; any remote client that can reach the proxy port can trivially perform the attack via a crafted URI scheme.
Severity
- EPSS
- 9.2% chance of exploitation in the next 30 days; higher than 95% of CVEs (scores of 2026-10-31)
- CWE
- CWE-787
- Published
- Modified
- Record from
- the NVD, synced
Affected
- canonical:ubuntu_linux
- debian:debian_linux
- fedoraproject:fedora
- squid-cache:squid
References
- http://www.squid-cache.org/Advisories/SQUID-2019_8.txt
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-fbbdf75efd7a5cc244b4886a9d42ea458c5a3a73.patch
- https://bugzilla.suse.com/show_bug.cgi?id=1156329
- https://github.com/squid-cache/squid/pull/275
- https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html