CVE-2023-46846

Publication date 3 November 2023

Last updated 19 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

SQUID is vulnerable to HTTP request smuggling, caused by chunked decoder lenience, allows a remote attacker to perform Request/Response smuggling past firewall and frontend security systems.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
squid	25.10 questing	Fixed 6.1-2ubuntu2
	25.04 plucky	Fixed 6.1-2ubuntu2
	24.10 oracular	Fixed 6.1-2ubuntu2
	24.04 LTS noble	Fixed 6.1-2ubuntu2
	23.10 mantic	Fixed 6.1-2ubuntu1.1
	23.04 lunar	Fixed 5.7-1ubuntu3.1
	22.04 LTS jammy	Fixed 5.7-0ubuntu0.22.04.2
	20.04 LTS focal	Fixed 4.10-1ubuntu1.8
	18.04 LTS bionic	Ignored end of standard support
	16.04 LTS xenial	Ignored end of standard support
	14.04 LTS trusty	Ignored end of standard support
squid3	25.10 questing	Not in release
	25.04 plucky	Not in release
	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Needs evaluation
	14.04 LTS trusty	Ignored end of standard support

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
squid	Upstream: 6cfa10d Upstream: 05f6af2

Severity score breakdown

Parameter	Value
Base score	9.3 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Changed
Confidentiality	High
Integrity impact	Low
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

References

Related Ubuntu Security Notices (USN)

USN-6500-1
Squid vulnerabilities
21 November 2023