CVE & CISA-KEV Catalog

CVE-2023-25565

HIGH
7.5
CVSS v3
NVD

Description

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.

CWE-590CWE-763

How to fix

Remediation Available
gss-ntlmsspDebian
Fixed in:1.2.0-1CVE-2023-25565
Fixed in:1.2.0-1CVE-2023-25565
Fixed in:1.2.0-1CVE-2023-25565
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
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
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-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
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
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
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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.