CVE-2023-6918

Summary

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.

Affected Software

Weaknesses

• CWE-252: Unchecked Return Value

Workarounds

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

ADP Enrichment

CVE Program Container

Additional References

• https://access.redhat.com/errata/RHSA-2024:2504
• https://access.redhat.com/errata/RHSA-2024:3233
• https://access.redhat.com/security/cve/CVE-2023-6918
• https://bugzilla.redhat.com/show_bug.cgi?id=2254997
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LZQVUHWVWRH73YBXUQJOD6CKHDQBU3DM/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MKQRBF3DWMWPH36LBCOBUTSIZRTPEZXB/
• https://www.libssh.org/2023/12/18/libssh-0-10-6-and-libssh-0-9-8-security-releases/
• https://www.libssh.org/security/advisories/CVE-2023-6918.txt
• https://security.netapp.com/advisory/ntap-20250214-0009/

References

• https://access.redhat.com/errata/RHSA-2024:2504
• https://access.redhat.com/errata/RHSA-2024:3233
• https://access.redhat.com/security/cve/CVE-2023-6918
• https://bugzilla.redhat.com/show_bug.cgi?id=2254997
• https://www.libssh.org/2023/12/18/libssh-0-10-6-and-libssh-0-9-8-security-releases/
• https://www.libssh.org/security/advisories/CVE-2023-6918.txt

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