CVE & CISA-KEV Catalog

CVE-2023-25567

HIGH
7.5
CVSS v3
NVD

Description

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.

How to fix

Remediation Available
gss-ntlmsspDebian
Fixed in:1.2.0-1CVE-2023-25567
Fixed in:1.2.0-1CVE-2023-25567
Fixed in:1.2.0-1CVE-2023-25567
gssntlmsspRocky
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
gssntlmsspRed Hat / RHEL
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
gssntlmssp-debuginfoRed Hat / RHEL
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
gssntlmssp-debuginfoRocky
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
gssntlmssp-debugsourceRocky
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
gssntlmssp-debugsourceRed Hat / RHEL
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
Fixed in:0:1.2.0-1.el8_8RHSA-2023:3097
gss-ntlmsspUbuntu
Fixed in:0.7.0-3~ubuntu0.16.04.1+esm1USN-7588-1
Fixed in:0.7.0-4ubuntu0.18.04.1~esm1USN-7588-1
Fixed in:0.7.0-4ubuntu0.20.04.1~esm1USN-7588-1
Fixed in:0.7.0-4ubuntu0.22.04.1~esm1USN-7588-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

1.10%probability of exploitation in 30 days
62ndpercentile

Moderate risk: more likely to be exploited than 62% of all known CVEs.

References

Third-Party Advisory2

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2014-0160High7.5100%KEVFix
CVE-2025-5777High7.5100%KEV + RansomFix
CVE-2021-4034High7.895%KEVFix
CVE-2023-21769High7.592%-Fix
CVE-2023-49285High8.689%-Fix
CVE-2020-8794Critical9.889%-Fix
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.