CVSS 3.1
6.1 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NCVE-2019-18677
An issue was discovered in Squid 3.x and 4.x through 4.8 when the append_domain setting is used (because the appended characters do not properly interact with hostname length restrictions). Due to incorrect message processing, it can inappropriately redirect traffic to origins it should not be delivered to.
Severity
- EPSS
- 3.9% chance of exploitation in the next 30 days; higher than 90% of CVEs (scores of 2026-10-31)
- CWE
- CWE-352
- Published
- Modified
- Record from
- the NVD, synced
Affected
- canonical:ubuntu_linux
- fedoraproject:fedora
- squid-cache:squid
References
- http://www.squid-cache.org/Advisories/SQUID-2019_9.txt
- http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-e5f1813a674848dde570f7920873e1071f96e0b4.patch
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-36492033ea4097821a4f7ff3ddcb971fbd1e8ba0.patch
- https://bugzilla.suse.com/show_bug.cgi?id=1156328
- https://github.com/squid-cache/squid/pull/427