CVE-2019-18677: canonical ubuntu_linux Cross-Site Request Forgery (CSRF)
Vulnerability summary
CVE-2019-18677 is a medium (CVSS 6.1) Cross-Site Request Forgery (CSRF) vulnerability in canonical ubuntu_linux. EPSS estimates a 7.24% chance of exploitation in the next 30 days, higher than 94.2% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 13 · Related 8Timeline
- 26-11-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- OSV · DebianEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS trend
Probability
7.24%
Chance of exploitation in the next 30 days
Percentile
94%
Versus all other CVEs
30-day change
0.00 pp
From 7.24% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu2 products
- squid< 4.9-2ubuntu1
- squid3< 3.5.12-1ubuntu7.9 | < 3.5.27-1ubuntu1.4
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04 | 19.04 | 19.10
Debian1 product
- squid< 4.9-1
Fedoraproject1 product
- fedoraEOL30 | 31
Squid-cache1 product
- squid≥ 2.0, ≤ 2.7 | ≥ 3.0, ≤ 3.5.28 | ≥ 4.0, ≤ 4.8 | 2.7:stable2 | 2.7:stable3 | 2.7:stable4 | 2.7:stable5 | 2.7:stable6 | 2.7:stable7 | 2.7:stable8 | 2.7:stable9
5 vendors · 6 products
References
15 links- www.squid-cache.org/Versions/v4/changesets/squid-4-36492033ea4097821a4f7ff3ddcb971fbd1e8ba0.patchX Refsource CONFIRMRelease Notes
lists.debian.org/debian-lts-announce/2019/12/msg00011.htmlMailing ListX Refsource MLISTThird Party Advisory