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Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS : GSS NTLMSSP vulnerabilities (USN-7588-1)

high Nessus Plugin ID 240491

Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7588-1 advisory.

 Phil Turnbull discovered that GSS NTLMSSP may perform out-of-bounds reads

 when decoding NTLM fields and target information. An attacker could

 possibly use this issue to cause GSS NTLMSSP to crash, resulting in

 a denial of service. (CVE-2023-25563, CVE-2023-25567)

 Phil Turnbull discovered that GSS NTLMSSP did not properly initialize memory when decoding UTF16 strings.
 An attacker could possibly use

 this issue to trigger an out-of-bounds write, resulting in a crash. (CVE-2023-25564)

 Phil Turnbull discovered that GSS NTLMSSP did not properly handle memory cleanup. An attacker could possibly use this issue to cause an assertion failure, resulting in a denial of service. (CVE-2023-25565)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected gss-ntlmssp and / or gss-ntlmssp-dev packages.

See Also

https://ubuntu.com/security/notices/USN-7588-1

Plugin Details

Severity: High

ID: 240491

File Name: ubuntu_USN-7588-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 6/25/2025

Updated: 6/25/2025

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.2

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:C

CVSS Score Source: CVE-2023-25564

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:gss-ntlmssp, p-cpe:/a:canonical:ubuntu_linux:gss-ntlmssp-dev

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 6/23/2025

Vulnerability Publication Date: 2/14/2023

Reference Information

CVE: CVE-2023-25563, CVE-2023-25564, CVE-2023-25565, CVE-2023-25567

USN: 7588-1