CVE-2018-10933

Publication date 16 October 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A vulnerability was found in libssh's server-side state machine before versions 0.7.6 and 0.8.4. A malicious client could create channels without first performing authentication, resulting in unauthorized access.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libssh	18.10 cosmic	Fixed 0.8.1-1ubuntu0.1
	18.04 LTS bionic	Fixed 0.8.0~20170825.94fa1e38-1ubuntu0.1
	16.04 LTS xenial	Fixed 0.6.3-4.3ubuntu0.1
	14.04 LTS trusty	Fixed 0.6.1-0ubuntu3.4

Patch details

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

Package	Patch details
libssh	Upstream: https://www.libssh.org/security/patches/stable-0.6_CVE-2018-10933.jmcd.patch01.txt 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	9.1 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	None
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVE-2018-10933

Cvss 3 Severity Score

Description

Status

Patch details

Severity score breakdown

References

Related Ubuntu Security Notices (USN)

Other references