CVE-2021-3537: Null Pointer Dereference
First published: Sat May 01 2021(Updated: )
A NULL pointer dereference flaw was found in libxml2, where it did not propagate errors while parsing XML mixed content. This flaw causes the application to crash if an untrusted XML document is parsed in recovery mode and post validated. The highest threat from this vulnerability is to system availability.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/jbcs-httpd24-apr-util | <0:1.6.1-91.el8 | 0:1.6.1-91.el8 |
| redhat/jbcs-httpd24-curl | <0:7.78.0-3.el8 | 0:7.78.0-3.el8 |
| redhat/jbcs-httpd24-httpd | <0:2.4.37-80.el8 | 0:2.4.37-80.el8 |
| redhat/jbcs-httpd24-nghttp2 | <0:1.39.2-41.el8 | 0:1.39.2-41.el8 |
| redhat/jbcs-httpd24-openssl | <1:1.1.1g-11.el8 | 1:1.1.1g-11.el8 |
| redhat/jbcs-httpd24-openssl-chil | <0:1.0.0-11.el8 | 0:1.0.0-11.el8 |
| redhat/jbcs-httpd24-openssl-pkcs11 | <0:0.4.10-26.el8 | 0:0.4.10-26.el8 |
| redhat/jbcs-httpd24-apr-util | <0:1.6.1-91.jbcs.el7 | 0:1.6.1-91.jbcs.el7 |
| redhat/jbcs-httpd24-curl | <0:7.78.0-3.jbcs.el7 | 0:7.78.0-3.jbcs.el7 |
| redhat/jbcs-httpd24-httpd | <0:2.4.37-80.jbcs.el7 | 0:2.4.37-80.jbcs.el7 |
| redhat/jbcs-httpd24-nghttp2 | <0:1.39.2-41.jbcs.el7 | 0:1.39.2-41.jbcs.el7 |
| redhat/jbcs-httpd24-openssl | <1:1.1.1g-11.jbcs.el7 | 1:1.1.1g-11.jbcs.el7 |
| redhat/jbcs-httpd24-openssl-chil | <0:1.0.0-11.jbcs.el7 | 0:1.0.0-11.jbcs.el7 |
| redhat/jbcs-httpd24-openssl-pkcs11 | <0:0.4.10-26.jbcs.el7 | 0:0.4.10-26.jbcs.el7 |
| redhat/libxml2 | <0:2.9.7-9.el8_4.2 | 0:2.9.7-9.el8_4.2 |
| redhat/libxml2 | <2.9.11 | 2.9.11 |
| IBM Security Verify Access OIDC Provider | <=10.0.0 | |
| libxml2-devel | <2.9.11 | |
| Red Hat JBoss Core Services | ||
| Red Hat Enterprise Linux | =6.0 | |
| Red Hat Enterprise Linux | =7.0 | |
| Red Hat Enterprise Linux | =8.0 | |
| Debian | =9.0 | |
| Fedora | =33 | |
| Fedora | =34 | |
| NetApp Active IQ Unified Manager for VMware vSphere | ||
| IBM Data ONTAP | ||
| NetApp ONTAP Antivirus Connector | ||
| NetApp Manageability SDK | ||
| NetApp ONTAP Select Deploy | ||
| NetApp SnapDrive for Windows | ||
| NetApp H410C | ||
| NetApp H410C | ||
| Oracle Communications Cloud Native Core Network Function Cloud Native Environment | =1.10.0 | |
| Oracle Enterprise Manager | =13.4.0.0 | |
| Oracle Enterprise Manager | =13.5.0.0 | |
| Oracle Enterprise Manager Ops Center | =12.4.0.0 | |
| Oracle MySQL Workbench CE | <=8.0.26 | |
| OpenJDK 8 | =8-update301 | |
| Oracle Peoplesoft Enterprise Campus Software Campus Community | =8.58 | |
| Oracle Real User Experience Insight | =13.4.1.0 | |
| Oracle Real User Experience Insight | =13.5.1.0 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-3537 https://nvd.nist.gov/vuln/detail/CVE-2021-3537
- https://bugzilla.redhat.com/show_bug.cgi?id=1956522
- https://access.redhat.com/errata/RHSA-2022:1389
- https://access.redhat.com/errata/RHSA-2021:2569
- https://access.redhat.com/errata/RHSA-2022:1390
- https://access.redhat.com/errata/RHBA-2021:2854
- https://access.redhat.com/security/cve/cve-2021-3537
- https://gitlab.gnome.org/GNOME/libxml2/-/issues/243
- https://gitlab.gnome.org/GNOME/libxml2/-/issues/244
- https://gitlab.gnome.org/GNOME/libxml2/-/issues/245
- https://gitlab.gnome.org/GNOME/libxml2/-/commit/babe75030c7f64a37826bb3342317134568bef61
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1956524
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1956523
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1956525
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1956528
- https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/
- https://security.gentoo.org/glsa/202107-05
- https://security.netapp.com/advisory/ntap-20210625-0002/
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/
- https://exchange.xforce.ibmcloud.com/vulnerabilities/203084
- https://www.ibm.com/support/pages/node/6493729
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the vulnerability ID for this flaw?
The vulnerability ID for this flaw is CVE-2021-3537.
What is the severity of CVE-2021-3537?
The severity of CVE-2021-3537 is high, with a severity value of 7.
How does CVE-2021-3537 affect libxml2?
CVE-2021-3537 affects libxml2 versions before 2.9.11 by causing a NULL pointer dereference while parsing XML mixed content.
How can an attacker exploit CVE-2021-3537?
An attacker can exploit CVE-2021-3537 by providing an untrusted XML document in recovery mode and post-validation, which can crash the application.
Is there a fix for CVE-2021-3537?
Yes, the fix for CVE-2021-3537 is to update to libxml2 version 2.9.11 or newer.
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