PT-2023-6121 · Libxml2+5 · Libxml2+5

Alan Coopersmith · Published 2023-10-06 · Updated 2025-07-27 · CVE-2023-45322

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions libxml2 versions 2.11.5 and earlier

Description The issue is related to a use-after-free vulnerability in the xmlUnlinkNode function, located in tree.c, which can occur after a certain memory allocation fails. This could potentially allow a remote attacker to cause a denial of service. The vendor has stated that they do not consider this issue critical enough to warrant a fix because an attacker typically cannot control when memory allocations fail.

Recommendations For libxml2 versions 2.11.5 and earlier, as a temporary workaround, consider disabling the xmlUnlinkNode function until a patch is available. Restrict access to the tree.c module to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALT-PU-2023-8083

AZL-31272

AZL-34960

BDU:2023-06827

CVE-2023-45322

DLA-4064-1

DSA-5949-1

ECHO-86F2-08FD-B895

MGASA-2023-0298

OESA-2023-1742

OPENSUSE-SU-2023_4464-1

OPENSUSE-SU-2023_4504-1

OPENSUSE-SU-2023_4537-1

OPENSUSE-SU-2024:13426-1

ROSA-SA-2024-2467

SUSE-SU-2023:4464-1

SUSE-SU-2023:4504-1

SUSE-SU-2023:4505-1

SUSE-SU-2023:4537-1

SUSE-SU-2023_4504-1

SUSE-SU-2023_4505-1

SUSE-SU-2023_4537-1

Affected Products

Alt Linux

Astra Linux

Debian

Red Os

Suse

Libxml2

References · 49

• https://gitlab.gnome.org/GNOME/libxml2/-/issues/344 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2023-0298 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2023:4537-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2023:4504-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-45322 · Security Note
• https://bdu.fstec.ru/vul/2023-06827 · Security Note
• https://osv.dev/vulnerability/AZL-31272 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2023:4505-1 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-5949-1 · Vendor Advisory
• http://repo.red-soft.ru/redos/7.3c/x86_64/updates · Vendor Advisory
• https://advisories.mageia.org/MGASA-2023-0298.html · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2023-45322 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-45322 · Vendor Advisory
• https://osv.dev/vulnerability/AZL-34960 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:13426-1 · Vendor Advisory