CWE
668 179
Advisory Published
Updated

CVE-2022-25236

First published: Wed Feb 16 2022(Updated: )

A flaw was found in expat. Passing one or more namespace separator characters in the "xmlns[:prefix]" attribute values made expat send malformed tag names to the XML processor on top of expat. This issue causes arbitrary code execution depending on how unexpected cases are handled inside the XML processor.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/expat<0:2.0.1-14.el6_10
0:2.0.1-14.el6_10
redhat/firefox<0:91.7.0-3.el7_9
0:91.7.0-3.el7_9
redhat/thunderbird<0:91.7.0-2.el7_9
0:91.7.0-2.el7_9
redhat/expat<0:2.1.0-14.el7_9
0:2.1.0-14.el7_9
redhat/firefox<0:91.7.0-3.el8_5
0:91.7.0-3.el8_5
redhat/thunderbird<0:91.7.0-2.el8_5
0:91.7.0-2.el8_5
redhat/mingw-expat<0:2.4.8-1.el8
0:2.4.8-1.el8
redhat/expat<0:2.2.5-4.el8_5.3
0:2.2.5-4.el8_5.3
redhat/firefox<0:91.7.0-3.el8_1
0:91.7.0-3.el8_1
redhat/thunderbird<0:91.7.0-2.el8_1
0:91.7.0-2.el8_1
redhat/expat<0:2.2.5-3.el8_1.1
0:2.2.5-3.el8_1.1
redhat/firefox<0:91.7.0-3.el8_2
0:91.7.0-3.el8_2
redhat/thunderbird<0:91.7.0-2.el8_2
0:91.7.0-2.el8_2
redhat/expat<0:2.2.5-3.el8_2.2
0:2.2.5-3.el8_2.2
redhat/firefox<0:91.7.0-3.el8_4
0:91.7.0-3.el8_4
redhat/thunderbird<0:91.7.0-2.el8_4
0:91.7.0-2.el8_4
redhat/expat<0:2.2.5-4.el8_4.2
0:2.2.5-4.el8_4.2
redhat/redhat-virtualization-host<0:4.3.22-20220330.1.el7_9
0:4.3.22-20220330.1.el7_9
Libexpat Project Libexpat<2.4.5
Debian Debian Linux=10.0
Debian Debian Linux=11.0
Oracle HTTP Server=12.2.1.3.0
Oracle HTTP Server=12.2.1.4.0
Oracle ZFS Storage Appliance Kit=8.8
Siemens SINEMA Remote Connect Server<3.1
redhat/expat<2.4.5
2.4.5
debian/expat
2.2.10-2+deb11u5
2.2.10-2+deb11u6
2.5.0-1+deb12u1
2.6.4-1

Remedy

There is no known mitigation other than restricting applications using the expat library from processing untrusted XML content. Please update the affected packages as soon as possible.

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID of this flaw in Expat?

    The vulnerability ID of this flaw in Expat is CVE-2022-25236.

  • What is the severity level of CVE-2022-25236?

    The severity level of CVE-2022-25236 is critical.

  • What is the affected software of CVE-2022-25236?

    The affected software of CVE-2022-25236 includes Expat (libexpat) versions before 2.4.5, Red Hat, Firefox, Thunderbird, mingw-expat, and others.

  • How can an attacker exploit CVE-2022-25236?

    An attacker can exploit CVE-2022-25236 by passing namespace separator characters in the "xmlns[:prefix]" attribute values, causing expat to send malformed tag names to the XML processor.

  • Where can I find more information about CVE-2022-25236?

    You can find more information about CVE-2022-25236 at the following references: http://www.openwall.com/lists/oss-security/2022/02/19/1, https://github.com/libexpat/libexpat/pull/561, and https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2056371

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