CWE
682 130 119
Advisory Published
Updated

CVE-2021-45960: Buffer Overflow

First published: Sat Jan 01 2022(Updated: )

Expat (aka libexpat) is vulnerable to a denial of service, caused by a realloc misbehavior issue in the storeAtts function in xmlparse.c. By persuading a victim to open a specially-crafted XML content, a remote attacker could exploit this vulnerability to cause a the application to crash.

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

Affected SoftwareAffected VersionHow to fix
redhat/expat<0:2.1.0-14.el7_9
0:2.1.0-14.el7_9
redhat/expat<0:2.2.5-4.el8_5.3
0:2.2.5-4.el8_5.3
debian/expat<=2.2.6-2<=2.2.10-2<=2.2.6-2+deb10u1<=2.4.2-1
2.4.3-1
2.2.6-2+deb10u2
2.2.10-2+deb11u1
redhat/expat<2.4.3
2.4.3
Libexpat Project Libexpat<2.4.3
Tenable Nessus<8.15.3
Tenable Nessus>=10.0.0<10.1.1
Debian Debian Linux=10.0
Debian Debian Linux=11.0
Siemens SINEMA Remote Connect Server<3.1
Netapp Active Iq Unified Manager Vmware Vsphere
Netapp Hci Baseboard Management Controller=h610c
Netapp Hci Baseboard Management Controller=h610s
Netapp Hci Baseboard Management Controller=h615c
NetApp OnCommand Workflow Automation
Netapp Solidfire \& Hci Management Node
debian/expat
2.2.10-2+deb11u5
2.2.10-2+deb11u6
2.5.0-1+deb12u1
2.6.4-1
IBM Cognos Analytics<=12.0.0-12.0.3
IBM Cognos Analytics<=11.2.0-11.2.4 FP4

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2021-45960?

    CVE-2021-45960 is a vulnerability in Expat (libexpat) which can cause process interruption and unexpected termination due to buffer overrun when processing a large number of prefixed XML attributes on a single tag.

  • What is the severity of CVE-2021-45960?

    The severity of CVE-2021-45960 is critical with a CVSS score of 8.8.

  • Which software is affected by CVE-2021-45960?

    Expat (libexpat) versions prior to 2.4.3 are affected by CVE-2021-45960.

  • How can I fix CVE-2021-45960?

    To fix CVE-2021-45960, update Expat (libexpat) to version 2.4.3 or later.

  • Are there any references for CVE-2021-45960?

    Yes, you can find references for CVE-2021-45960 at the following links: [Link 1](https://github.com/libexpat/libexpat/issues/531), [Link 2](https://github.com/libexpat/libexpat/pull/534), [Link 3](https://bugzilla.mozilla.org/show_bug.cgi?id=1217609).

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