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CVE-2020-11945

Published: 23 April 2020

An issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials).

Priority

Medium

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
squid
Launchpad, Ubuntu, Debian
focal
Released (4.10-1ubuntu1.1)
hirsute
Released (4.10-1ubuntu2)
bionic Does not exist

eoan
Released (4.8-1ubuntu2.3)
groovy
Released (4.10-1ubuntu2)
trusty Does not exist

upstream
Released (4.11)
xenial Does not exist

Patches:
upstream: http://www.squid-cache.org/Versions/v4/changesets/squid-4-eeebf0f37a72a2de08348e85ae34b02c34e9a811.patch
squid3
Launchpad, Ubuntu, Debian
hirsute Does not exist

bionic
Released (3.5.27-1ubuntu1.6)
eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream Needs triage

xenial
Released (3.5.12-1ubuntu7.11)

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H