Debian DLA-2369-1 : libxml2 security update

critical Nessus Plugin ID 140469

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Synopsis

The remote Debian host is missing a security update.

Description

Several security vulnerabilities were corrected in libxml2, the GNOME XML library.

CVE-2017-8872

Global buffer-overflow in the htmlParseTryOrFinish function.

CVE-2017-18258

The xz_head function in libxml2 allows remote attackers to cause a denial of service (memory consumption) via a crafted LZMA file, because the decoder functionality does not restrict memory usage to what is required for a legitimate file.

CVE-2018-14404

A NULL pointer dereference vulnerability exists in the xpath.c:xmlXPathCompOpEval() function of libxml2 when parsing an invalid XPath expression in the XPATH_OP_AND or XPATH_OP_OR case.
Applications processing untrusted XSL format inputs may be vulnerable to a denial of service attack.

CVE-2018-14567

If the option --with-lzma is used, allows remote attackers to cause a denial of service (infinite loop) via a crafted XML file.

CVE-2019-19956

The xmlParseBalancedChunkMemoryRecover function has a memory leak related to newDoc->oldNs.

CVE-2019-20388

A memory leak was found in the xmlSchemaValidateStream function of libxml2. Applications that use this library may be vulnerable to memory not being freed leading to a denial of service.

CVE-2020-7595

Infinite loop in xmlStringLenDecodeEntities can cause a denial of service.

CVE-2020-24977

Out-of-bounds read restricted to xmllint --htmlout.

For Debian 9 stretch, these problems have been fixed in version 2.9.4+dfsg1-2.2+deb9u3.

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

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

Plugin Details

Severity: Critical

ID: 140469

File Name: debian_DLA-2369.nasl

Version: 1.6

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 9/10/2020

Updated: 2/21/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

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

CVSS Score Source: CVE-2020-24977

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

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

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

CVSS Score Source: CVE-2017-8872

Vulnerability Information

CPE: 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-dbg, p-cpe:/a:debian:debian_linux:libxml2-utils-dbg, p-cpe:/a:debian:debian_linux:libxml2-dev, cpe:/o:debian:debian_linux:9.0, p-cpe:/a:debian:debian_linux:libxml2, p-cpe:/a:debian:debian_linux:python-libxml2, p-cpe:/a:debian:debian_linux:libxml2-doc, p-cpe:/a:debian:debian_linux:python-libxml2-dbg

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/9/2020

Vulnerability Publication Date: 5/10/2017

Reference Information

CVE: CVE-2017-18258, CVE-2017-8872, CVE-2018-14404, CVE-2018-14567, CVE-2019-19956, CVE-2019-20388, CVE-2020-24977, CVE-2020-7595

Detections

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