CVE-2023-25565

highpriority · track · 30EPSS 0.011 · 66 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.10% (66th) EPSS

CVSS 7.5 · high

Is it mine?

22 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedgssntlmssp-0:1.2.0-1.el8_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:3097
Fixedgssntlmssp-0:1.2.0-1.el8_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:3097
Fixedgssntlmssp-0:1.2.0-1.el8_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:3097
Fixedgssntlmssp-0:1.2.0-1.el8_8.src as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:3097
Fixedgssntlmssp-0:1.2.0-1.el8_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:3097
Fixedgssntlmssp-debuginfo-0:1.2.0-1.el8_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:3097
Fixedgssntlmssp-debuginfo-0:1.2.0-1.el8_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:3097
Fixedgssntlmssp-debuginfo-0:1.2.0-1.el8_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:3097
Fixedgssntlmssp-debuginfo-0:1.2.0-1.el8_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:3097
Fixedgssntlmssp-debugsource-0:1.2.0-1.el8_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:3097
Fixedgssntlmssp-debugsource-0:1.2.0-1.el8_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:3097
Fixedgssntlmssp-debugsource-0:1.2.0-1.el8_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:3097
Fixedgssntlmssp-debugsource-0:1.2.0-1.el8_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:3097

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · security-advisories@github.comexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · Red Hat Product Security US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-763USprimaryCWE-590USCWE-590USCWE-590US

affected products (22)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
RESF Rocky Linuxall versionscert_bundDEcpe:/o:resf:rocky_linux:-
Red Hat Enterprise Linux 8all versionscert_bundDEcpe:/o:redhat:enterprise_linux:8
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
gssapi gss-ntlmssp≤ < 1.2.0enisa_euvdEU
Сообщество свободного программного обеспечения GSS-NTLMSSP≤ 1.1.0fstec_bduRU
gss-ntlmssp project gss-ntlmssp< 1.2.0nvdUScpe:2.3:a:gss-ntlmssp_project:gss-ntlmssp:*:*:*:*:*:*:*:*
gssntlmssp-0:1.2.0-1.el8_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS
gssntlmssp-0:1.2.0-1.el8_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS
gssntlmssp-0:1.2.0-1.el8_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS
gssntlmssp-0:1.2.0-1.el8_8.src as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS
gssntlmssp-0:1.2.0-1.el8_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS
gssntlmssp-debuginfo-0:1.2.0-1.el8_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS
gssntlmssp-debuginfo-0:1.2.0-1.el8_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS
gssntlmssp-debuginfo-0:1.2.0-1.el8_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS
gssntlmssp-debuginfo-0:1.2.0-1.el8_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS
gssntlmssp-debugsource-0:1.2.0-1.el8_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS
gssntlmssp-debugsource-0:1.2.0-1.el8_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsfixedredhat_csafUS

showing 20 of 22

advisories (2)

Vendor and ecosystem advisories describing this.

RHSA-2023:3097Red Hat Security Advisory: gssntlmssp security update2023-05-16csaf · redhat_csafUS
An update for gssntlmssp is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
WID-SEC-W-2023-1238Red Hat Enterprise Linux: Mehrere Schwachstellen in verschiedenen KomponentenDeutsch2023-05-16csaf · cert_bundDE
Ein entfernter, anonymer oder lokaler Angreifer kann mehrere Schwachstellen in verschiedenen Komponenten von Red Hat Enterprise Linux ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd redhat_csaf NVD CVE.org MITRE

published 2023-02-14modified 2026-06-17

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+166 more

references (11)

External citations — patches, advisories, analysis.

scry

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