Description
GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, a memory leak can be triggered when parsing usernames which can trigger a denial-of-service. The domain portion of a username may be overridden causing an allocated memory area the size of the domain name to be leaked. An attacker can leak memory via the main `gss_accept_sec_context` entry point, potentially causing a denial-of-service. This issue is fixed in version 1.2.0.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| gssapi | gss-ntlmssp | < 1.2.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | gss-ntlmssp | 1.2.0-1 | — |
| Debian 13 | gss-ntlmssp | 1.2.0-1 | — |
| Debian 12 | gss-ntlmssp | 1.2.0-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | gssntlmssp | 1.2.0-1.el8_8 | RHSA-2023:3097 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | gssntlmssp | 1.2.0-1.el8_8 | ALSA-2023:3097 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP4 | gssntlmssp | 1.2.0-bp154.2.3.1 | openSUSE-SU-2023:0048-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.4 | gssntlmssp | 1.2.0-bp154.2.3.1 | openSUSE-SU-2023:0048-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | gssntlmssp | 1.3.1-1 | — |
| Azure Linux 2 (CBL-Mariner) | gssntlmssp | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | gssntlmssp | 1.2.0-1.el8_8 | ELSA-2023-3097 |
Advisories 5
- ALSA-2023:3097 Moderate: gssntlmssp security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2023-1238 Red Hat Enterprise Linux: Mehrere Schwachstellen in verschiedenen Komponenten BSI CERT-Bund (WID) · Jun 28, 2026
- openSUSE-SU-2023:0048-1 Security update for gssntlmssp SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2023:3097 Red Hat Security Advisory: gssntlmssp security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- ELSA-2023-3097 Moderate: gssntlmssp security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 24, 2023