FreeBSD : njs -- heap buffer overflow in XML exclusive canonicalization (0bfb082c-a7b6-11f1-a655-3497f65b111b)

critical Nessus Plugin ID 342830

Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 0bfb082c-a7b6-11f1-a655-3497f65b111b advisory.

F5 reports:
A flaw in the NGINX JavaScript XML module allows an out-of-bounds write when xml.exclusiveC14n() processes a crafted XML namespace prefix list. This may lead to worker process crashes, heap corruption or memory disclosure. The NGINX SAML reference implementation is affected because it processes SAML data before signature verification.

Tenable has extracted the preceding description block directly from the FreeBSD 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

Update the affected packages.

Plugin Details

Severity: Critical

ID: 342830

File Name: freebsd_pkg_0bfb082ca7b611f1a6553497f65b111b.nasl

Version: 1.1

Type: Local

Family: FreeBSD Local Security Checks

Published: 9/4/2026

Updated: 9/4/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.19

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 5.6

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

CVSS Score Source: CVE-2026-78689

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.2

Threat Score: 7.2

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:libnjs, p-cpe:/a:freebsd:freebsd:nginx-full, p-cpe:/a:freebsd:freebsd:nginx-module-njs, p-cpe:/a:freebsd:freebsd:njs

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 9/3/2026

Vulnerability Publication Date: 9/2/2026

Reference Information

CVE: CVE-2026-78689

Detections

Analytics