CVE-2021-3537

libxml2: NULL pointer dereference when post-validating mixed content parsed in recovery mode

Published May 14, 2021 CVSS 3.1 · 5.9 Medium EPSS 3.6% KEV · Not listed
Description
A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-2653-1 libxml2 security update
EUVD EUVD EUVD-2022-1938 A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.
Github GHSA Github GHSA GHSA-286v-pcf5-25rc Nokogiri Implements libxml2 version vulnerable to null pointer dereferencing
Ubuntu USN Ubuntu USN USN-4991-1 libxml2 vulnerabilities