[SECURITY] [DLA 2972-1] libxml2 security update
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Debian LTS Advisory DLA-2972-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Anton Gladky
April 08, 2022 https://wiki.debian.org/LTS
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Package : libxml2
Version : 2.9.4+dfsg1-2.2+deb9u6
CVE ID : CVE-2016-9318 CVE-2017-5130 CVE-2017-5969 CVE-2017-16932
CVE-2022-23308
Five security issues have been discovered in libxml2: XML C parser and toolkit.
CVE-2016-9318
Vulnerable versions do not offer a flag directly indicating that the current
document may be read but other files may not be opened, which makes it
easier for remote attackers to conduct XML External Entity (XXE) attacks via
a crafted document.
CVE-2017-5130
Integer overflow in memory debug code, allowed a remote attacker to
potentially exploit heap corruption via a crafted XML file.
CVE-2017-5969
Parser in a recover mode allows remote attackers to cause a denial of service
(NULL pointer dereference) via a crafted XML document.
CVE-2017-16932
When expanding a parameter entity in a DTD, infinite recursion could lead to
an infinite loop or memory exhaustion.
CVE-2022-23308
the application that validates XML using xmlTextReaderRead() with
XML_PARSE_DTDATTR and XML_PARSE_DTDVALID enabled becomes vulnerable to this
use-after-free bug. This issue can result in denial of service.
For Debian 9 stretch, these problems have been fixed in version
2.9.4+dfsg1-2.2+deb9u6.
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
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