CVE-2023-25567: Gss-Ntlmssp Project Gss-Ntlmssp

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

GSS-NTLMSSP, a mechglue plugin for the GSSAPI library that implements NTLM authentication, has an out-of-bounds read when decoding target information prior to version 1.2.0. The length of the `av_pair` is not checked properly for two of the elements which can trigger an out-of-bound read. The out-of-bounds read can be triggered via the main `gss_accept_sec_context` entry point and could cause a denial-of-service if the memory is unmapped. The issue is fixed in version 1.2.0.

Affected products

• Gss-Ntlmssp Project Gss-Ntlmssp: before 1.2.0 (fixed in 1.2.0)

Published 2023-02-14. Last modified 2026-06-17.