CVE-2023-6004

Publication date 3 January 2024

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

A flaw was found in libssh. By utilizing the ProxyCommand or ProxyJump feature, users can exploit unchecked hostname syntax on the client. This issue may allow an attacker to inject malicious code into the command of the features mentioned through the hostname parameter.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libssh	23.10 mantic	Fixed 0.10.5-3ubuntu1.2
	23.04 lunar	Fixed 0.10.4-2ubuntu0.3
	22.04 LTS jammy	Fixed 0.9.6-2ubuntu0.22.04.3
	20.04 LTS focal	Fixed 0.9.3-2ubuntu2.5
	18.04 LTS bionic	Fixed 0.8.0~20170825.94fa1e38-1ubuntu0.7+esm3 Ubuntu Pro
	16.04 LTS xenial	Fixed 0.6.3-4.3ubuntu0.6+esm1 Ubuntu Pro
	14.04 LTS trusty	Ignored end of standard support

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Notes

mdeslaur

original patches introduce a regression, see upstream bug

Patch details

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

Package	Patch details
libssh	Upstream: c2c56ba Upstream: a66b4a6 Upstream: 8615c24 Upstream: c618040 Upstream: 9bbb817 Upstream: 22492b6 Upstream: d746749 Upstream: 62d3101 Upstream: cea841d Upstream: 2c492ee Upstream: 1a02364 Upstream: 6f1b1e7

Severity score breakdown

Parameter	Value
Base score	4.8 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	Required
Scope	Unchanged
Confidentiality	Low
Integrity impact	Low
Availability impact	Low
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L