CVE-2023-1667

Publication date 9 May 2023

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

A NULL pointer dereference was found In libssh during re-keying with algorithm guessing. This issue may allow an authenticated client to cause a denial of service.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libssh	24.10 oracular	Fixed 0.10.5-2
	24.04 LTS noble	Fixed 0.10.5-2
	23.10 mantic	Fixed 0.10.5-2
	23.04 lunar	Fixed 0.10.4-2ubuntu0.1
	22.10 kinetic	Fixed 0.9.6-2ubuntu0.22.10.1
	22.04 LTS jammy	Fixed 0.9.6-2ubuntu0.22.04.1
	20.04 LTS focal	Fixed 0.9.3-2ubuntu2.3
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Ignored backporting risks regressions
	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
libssh	Upstream: ?h=stab Upstream: ?h=stab Upstream: ?h=stab Upstream: ?h=stab Upstream: ?h=stab Upstream: ?h=stab Upstream: ?h=stab Upstream: ?h=stab Upstream: ?h=stab Upstream: ?h=stab Upstream: ?h=stab Upstream: ?h=stab Upstream: ?h=stab Upstream: ?h=stab Upstream: ?h=stab Upstream: ?h=stab Upstream: ?h=stab

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-6138-1
libssh vulnerabilities
5 June 2023