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CVE-2019-18677

Published: 26 November 2019

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.

Priority

Medium

Cvss 3 Severity Score

6.1

Score breakdown

Status

Package Release Status
squid
Launchpad, Ubuntu, Debian
hirsute
Released (4.9-2ubuntu1)
bionic Does not exist

disco
Released (4.4-1ubuntu2.3)
eoan
Released (4.8-1ubuntu2.1)
focal
Released (4.9-2ubuntu1)
groovy
Released (4.9-2ubuntu1)
trusty Does not exist

upstream
Released (4.9-1)
xenial Does not exist

Patches:
upstream: http://www.squid-cache.org/Versions/v4/changesets/squid-4-36492033ea4097821a4f7ff3ddcb971fbd1e8ba0.patch

squid3
Launchpad, Ubuntu, Debian
hirsute Does not exist

bionic
Released (3.5.27-1ubuntu1.4)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream Needs triage

xenial
Released (3.5.12-1ubuntu7.9)
Patches:

upstream: http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-e5f1813a674848dde570f7920873e1071f96e0b4.patch

Severity score breakdown

Parameter Value
Base score 6.1
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Changed
Confidentiality Low
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N