FreeBSD : libxml2 -- multiple vulnerabilities (abbc8912-5efa-11f0-ae84-99047d0a6bcc)

low Nessus Plugin ID 242030

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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 multiple vulnerabilities as referenced in the abbc8912-5efa-11f0-ae84-99047d0a6bcc advisory.

Alan Coopersmith reports:
As discussed in https://gitlab.gnome.org/GNOME/libxml2/-/issues/913 the security policy of libxml2 has been changed to disclose vulnerabilities before fixes are available so that people other than the maintainer can contribute to fixing security issues in this library.
As part of this, the following 5 CVE's have been disclosed recently:
(CVE-2025-49794) Heap use after free (UAF) leads to Denial of service (DoS) https://gitlab.gnome.org/GNOME/libxml2/-/issues/931 [...] (CVE-2025-49795) Null pointer dereference leads to Denial of service (DoS) https://gitlab.gnome.org/GNOME/libxml2/-/issues/932 [...] (CVE-2025-49796) Type confusion leads to Denial of service (DoS) https://gitlab.gnome.org/GNOME/libxml2/-/issues/933 [...] For all three of the above, note that upstream is considering removing Schematron support completely, as discussed in https://gitlab.gnome.org/GNOME/libxml2/-/issues/935.
(CVE-2025-6021) Integer Overflow Leading to Buffer Overflow in xmlBuildQName() https://gitlab.gnome.org/GNOME/libxml2/-/issues/926 [...] (CVE-2025-6170) Stack-based Buffer Overflow in xmllint Shell https://gitlab.gnome.org/GNOME/libxml2/-/issues/941 [...]

Tenable has extracted the preceding description block directly from the FreeBSD 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 packages.

Plugin Details

Severity: Low

ID: 242030

File Name: freebsd_pkg_abbc89125efa11f0ae8499047d0a6bcc.nasl

Version: 1.2

Type: local

Family: FreeBSD Local Security Checks

Published: 7/12/2025

Updated: 7/15/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Low

Base Score: 1.2

Temporal Score: 0.9

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

CVSS Score Source: CVE-2025-6170

CVSS v3

Risk Factor: Low

Base Score: 2.5

Temporal Score: 2.2

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

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

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:libxml2, p-cpe:/a:freebsd:freebsd:linux-c7-libxml2, p-cpe:/a:freebsd:freebsd:linux-rl9-libxml2

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/12/2025

Vulnerability Publication Date: 6/12/2025

Reference Information

CVE: CVE-2025-49794, CVE-2025-49795, CVE-2025-6021, CVE-2025-6170

Detections

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