Cyber Resilience

CVE-2023-25565

Gss-Ntlmssp Project Gss-Ntlmssp ≤ 1.2.0

Published
14 February 2023
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.011 63th percentile
Risk Priority 60 floored blend · peak EPSS

Summary

CVE-2023-25565 is a high-severity Free of Memory not on the Heap (CWE-590) vulnerability in Gss-Ntlmssp Project Gss-Ntlmssp. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 37% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability Data

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…

more

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.

CWE(s)
CWE-590CWE-763

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-25567Same product: Gss-Ntlmssp Project Gss-Ntlmssp
CVE-2023-25563Same product: Gss-Ntlmssp Project Gss-Ntlmssp
CVE-2023-25564Same product: Gss-Ntlmssp Project Gss-Ntlmssp
CVE-2023-25566Same product: Gss-Ntlmssp Project Gss-Ntlmssp
CVE-2025-30379Shared CWE-763
CVE-2024-42132Shared CWE-763
CVE-2026-20810Shared CWE-590
CVE-2025-54899Shared CWE-590
CVE-2024-44852Shared CWE-763
CVE-2026-47312Shared CWE-763

Affected Assets

gss-ntlmssp project
gss-ntlmssp
≤ 1.2.0

Mitigating Controls

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly prevent incorrect free() calls via code review, static analysis, and developer training.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development can detect invalid-free defects before release.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle mandates memory-safety practices that reduce use-after-free and invalid-free bugs.

A.8.26 Application security requirements partial match
prevents

Application security requirements can specify correct use of release functions and pointer validation.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture and engineering principles include disciplined memory management that prevents freeing non-heap memory.

A.8.28 Secure coding partial match
prevents

Secure coding standards explicitly forbid freeing pointers not obtained from heap allocators, directly mitigating CWE-590.

References