CVE-2023-46848

Publication date 3 November 2023

Last updated 4 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Squid is vulnerable to Denial of Service, where a remote attacker can perform DoS by sending ftp:// URLs in HTTP Request messages or constructing ftp:// URLs from FTP Native input.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
squid	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	Not affected
	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	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	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Ignored end of standard support

Notes

mdeslaur

only affects 5.0.3+

Patch details

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

Package	Patch details
squid	Upstream: 7de0196 Upstream: c67bf04

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-6500-1
Squid vulnerabilities
21 November 2023