CVE-2021-3537 — NULL Pointer Dereference in Libxml2

CWE-476 — NULL Pointer Dereference11 documents9 sources
Severity
5.9MEDIUMNVD
GHSA7.5
EPSS
0.1%
top 70.45%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
12
Xmlsoft Libxml2NokogiriOracle Mysql Workbench+9 more
Timeline
PublishedMay 14
Latest updateOct 15

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.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 2.2 | Impact: 3.6

Affected Packages11 packages

▶NVDxmlsoft/libxml2< 2.9.11
▶Debianxmlsoft/libxml2< 2.9.10+dfsg-6.6+3
▶CVEListV5xmlsoft/libxml2libxml2 2.9.11
▶RubyGemsnokogiri/nokogiri< 1.11.4

Also affects: Debian Linux 9.0, Fedora 33, 34, Enterprise Linux 6.0, 7.0, 8.0

Patches

Patch: bugzilla.redhat.com ↗Patch: www.oracle.com ↗Patch: www.oracle.com ↗

🔴Vulnerability Details

5
GHSA
Nokogiri Implements libxml2 version vulnerable to null pointer dereferencing↗2022-05-24
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OSV
Nokogiri Implements libxml2 version vulnerable to null pointer dereferencing↗2022-05-24
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GHSA
Nokogiri updates packaged dependency on libxml2 from 2.9.10 to 2.9.12↗2021-05-17
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CVEList
CVE-2021-3537: A vulnerability found in libxml2 in versions before 2↗2021-05-14
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OSV
CVE-2021-3537: A vulnerability found in libxml2 in versions before 2↗2021-05-14
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📋Vendor Advisories

5
Oracle
Oracle Oracle Fusion Middleware Risk Matrix: SSL Module (libxml2) — CVE-2021-3537↗2022-10-15
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Ubuntu
libxml2 vulnerabilities↗2021-06-17
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Microsoft
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↗2021-05-11
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Red Hat
libxml2: NULL pointer dereference when post-validating mixed content parsed in recovery mode↗2021-05-01
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Debian
CVE-2021-3537: libxml2 - A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not...↗2021
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