Debian dla-4508 : libnss3 - security update

critical Nessus Plugin ID 303628

Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4508 advisory.

- ----------------------------------------------------------------------- Debian LTS Advisory DLA-4508-1 [email protected] https://www.debian.org/lts/security/ Utkarsh Gupta March 25, 2026 https://wiki.debian.org/LTS
- -----------------------------------------------------------------------

Package : nss Version : 2:3.61-1+deb11u5 CVE ID : CVE-2026-2781

Clay Ver Valen discovered an integer overflow in the AES-GCM implementation of the Mozilla Network Security Service libraries.

For Debian 11 bullseye, this problem has been fixed in version 2:3.61-1+deb11u5.

We recommend that you upgrade your nss packages.

For the detailed security status of nss please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/nss

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

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

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

Solution

Upgrade the libnss3 packages.

Plugin Details

Severity: Critical

ID: 303628

File Name: debian_DLA-4508.nasl

Version: 1.1

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 3/25/2026

Updated: 3/25/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-2781

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:libnss3, p-cpe:/a:debian:debian_linux:libnss3-dev, p-cpe:/a:debian:debian_linux:libnss3-tools

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/25/2026

Vulnerability Publication Date: 2/24/2026

Reference Information

CVE: CVE-2026-2781

Detections

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