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CVE-2023-6918

Publication date 19 December 2023

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.3 · Medium

Score breakdown

A flaw was found in the libssh implements abstract layer for message digest (MD) operations implemented by different supported crypto backends. The return values from these were not properly checked, which could cause low-memory situations failures, NULL dereferences, crashes, or usage of the uninitialized memory as an input for the KDF. In this case, non-matching keys will result in decryption/integrity failures, terminating the connection.

Status

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
16.04 LTS xenial
14.04 LTS trusty Ignored

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Patch details

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

Package Patch details
libssh

Severity score breakdown

Parameter Value
Base score 5.3 · Medium
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact Low
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L