Description
GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, memory corruption can be triggered when decoding UTF16 strings. The variable `outlen` was not initialized and could cause writing a zero to an arbitrary place in memory if `ntlm_str_convert()` were to fail, which would leave `outlen` uninitialized. This can lead to a denial of service if the write hits unmapped memory or randomly corrupts a byte in the application memory space. This vulnerability can trigger an out-of-bounds write, leading to memory corruption. This vulnerability can be triggered via the main `gss_accept_sec_context` entry point. This issue is fixed in version 1.2.0.
Published: 2023-02-14
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2023-29516 GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, memory corruption can be triggered when decoding UTF16 strings. The variable `outlen` was not initialized and could cause writing a zero to an arbitrary place in memory if `ntlm_str_convert()` were to fail, which would leave `outlen` uninitialized. This can lead to a denial of service if the write hits unmapped memory or randomly corrupts a byte in the application memory space. This vulnerability can trigger an out-of-bounds write, leading to memory corruption. This vulnerability can be triggered via the main `gss_accept_sec_context` entry point. This issue is fixed in version 1.2.0.
Ubuntu USN Ubuntu USN USN-7588-1 GSS NTLMSSP vulnerabilities
History

Mon, 10 Mar 2025 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Subscriptions

Gss-ntlmssp Project Gss-ntlmssp
Redhat Enterprise Linux
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-03-10T21:12:01.901Z

Reserved: 2023-02-07T17:10:00.735Z

Link: CVE-2023-25564

cve-icon Vulnrichment

Updated: 2024-08-02T11:25:19.239Z

cve-icon NVD

Status : Modified

Published: 2023-02-14T18:15:13.173

Modified: 2024-11-21T07:49:44.350

Link: CVE-2023-25564

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-02-14T00:00:00Z

Links: CVE-2023-25564 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses