CVE-2023-6918

medium

Description

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.

References

https://www.libssh.org/security/advisories/CVE-2023-6918.txt

https://www.libssh.org/2023/12/18/libssh-0-10-6-and-libssh-0-9-8-security-releases/

https://lists.fedoraproject.org/archives/list/[email protected]/message/MKQRBF3DWMWPH36LBCOBUTSIZRTPEZXB/

https://lists.fedoraproject.org/archives/list/[email protected]/message/LZQVUHWVWRH73YBXUQJOD6CKHDQBU3DM/

https://bugzilla.redhat.com/show_bug.cgi?id=2254997

https://access.redhat.com/security/cve/CVE-2023-6918

https://access.redhat.com/errata/RHSA-2024:2504

Details

Source: Mitre, NVD

Published: 2023-12-19

Updated: 2024-04-30

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 5.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Severity: Medium