Synopsis
The remote Debian host is missing one or more security-related updates.
Description
The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4064 advisory.
------------------------------------------------------------------------- Debian LTS Advisory DLA-4064-1 [email protected] https://www.debian.org/lts/security/ Tobias Frost February 22, 2025 https://wiki.debian.org/LTS
-------------------------------------------------------------------------
Package : libxml2 Version : 2.9.10+dfsg-6.7+deb11u6 CVE ID : CVE-2022-49043 CVE-2023-39615 CVE-2023-45322 CVE-2024-25062 CVE-2024-56171 CVE-2025-24928 CVE-2025-27113 Debian Bug : 1051230 1053629 1063234 1094238 1098320 1098321 1098322
Multiple vulnerabilities have been found in libxml2, a library providing support to read, modify and write XML and HTML files. These vulnerabilities could potentially lead to denial of servie or other unintended behaviors.
CVE-2022-49043
xmlXIncludeAddNode in xinclude.c in libxml2 before 2.11.0 has a use-after-free.
CVE-2023-39615
libxml2 v2.11.0 was discovered to contain an out-of-bounds read via the xmlSAX2StartElement() function at /libxml2/SAX2.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via supplying a crafted XML file. NOTE: the vendor's position is that the product does not support the legacy SAX1 interface with custom callbacks; there is a crash even without crafted input.
CVE-2023-45322
libxml2 through 2.11.5 has a use-after-free that can only occur after a certain memory allocation fails. This occurs in xmlUnlinkNode in tree.c. NOTE: the vendor's position is I don't think these issues are critical enough to warrant a CVE ID ...
because an attacker typically can't control when memory allocations fail.
CVE-2024-25062
An issue was discovered in libxml2 before 2.11.7 and 2.12.x before 2.12.5. When using the XML Reader interface with DTD validation and XInclude expansion enabled, processing crafted XML documents can lead to an xmlValidatePopElement use-after-free.
CVE-2024-56171
libxml2 before 2.12.10 and 2.13.x before 2.13.6 has a use-after-free in xmlSchemaIDCFillNodeTables and xmlSchemaBubbleIDCNodeTables in xmlschemas.c. To exploit this, a crafted XML document must be validated against an XML schema with certain identity constraints, or a crafted XML schema must be used.
CVE-2025-24928
libxml2 before 2.12.10 and 2.13.x before 2.13.6 has a stack-based buffer overflow in xmlSnprintfElements in valid.c. To exploit this, DTD validation must occur for an untrusted document or untrusted DTD. NOTE: this is similar to CVE-2017-9047.
CVE-2025-27113
libxml2 before 2.12.10 and 2.13.x before 2.13.6 has a NULL pointer dereference in xmlPatMatch in pattern.c.
For Debian 11 bullseye, these problems have been fixed in version 2.9.10+dfsg-6.7+deb11u6.
We recommend that you upgrade your libxml2 packages.
For the detailed security status of libxml2 please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/libxml2
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 Attachment:
signature.asc Description: PGP signature
Tenable has extracted the preceding description block directly from the Debian 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
Upgrade the libxml2 packages.
Plugin Details
File Name: debian_DLA-4064.nasl
Agent: unix
Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus
Risk Information
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:python3-libxml2-dbg, p-cpe:/a:debian:debian_linux:python3-libxml2, p-cpe:/a:debian:debian_linux:libxml2-utils, p-cpe:/a:debian:debian_linux:libxml2-dev, p-cpe:/a:debian:debian_linux:libxml2, p-cpe:/a:debian:debian_linux:libxml2-doc
Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l
Exploit Ease: Exploits are available
Patch Publication Date: 2/22/2025
Vulnerability Publication Date: 5/18/2017