Release of Invalid Pointer or Reference Affecting gss-ntlmssp package, versions <0.7.0-4ubuntu0.18.04.1~esm1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.07% (23rd percentile)

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  • Snyk IDSNYK-UBUNTU1804-GSSNTLMSSP-3319600
  • published24 Jun 2025
  • disclosed14 Feb 2023

Introduced: 14 Feb 2023

CVE-2023-25565  (opens in a new tab)
CWE-763  (opens in a new tab)

How to fix?

Upgrade Ubuntu:18.04 gss-ntlmssp to version 0.7.0-4ubuntu0.18.04.1~esm1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gss-ntlmssp package and not the gss-ntlmssp package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, an incorrect free when decoding target information can trigger a denial of service. The error condition incorrectly assumes the cb and sh buffers contain a copy of the data that needs to be freed. However, that is not the case. This vulnerability can be triggered via the main gss_accept_sec_context entry point. This will likely trigger an assertion failure in free, causing a denial-of-service. This issue is fixed in version 1.2.0.

CVSS Base Scores

version 3.1