critical
9.8
CWE
416
Advisory Published
CVE Published
Updated

CVE-2021-20232: Use After Free

First published: Fri Jan 29 2021(Updated: )

GnuTLS is vulnerable to a denial of service, caused by a use-after-free issue in client_send_params in lib/ext/pre_shared_key.c. By sending a specially-crafted request, an attacker could exploit this vulnerability to cause memory corruption and other consequences.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
IBM QRadar SIEM<=7.5.0 GA
IBM QRadar SIEM<=7.4.3 GA - 7.4.3 FP4
IBM QRadar SIEM<=7.3.3 GA - 7.3.3 FP10
redhat/gnutls<3.7.1
3.7.1
GNU GnuTLS>=3.6.3<3.7.1
Redhat Enterprise Linux=8.0
Fedoraproject Fedora=34

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=1922275

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2021-20232?

    CVE-2021-20232 is a vulnerability in GnuTLS that could allow an attacker to cause a denial of service by exploiting a use-after-free issue in client_send_params in lib/ext/pre_shared_key.c.

  • How does CVE-2021-20232 impact GnuTLS?

    CVE-2021-20232 could lead to memory corruption and other consequences, potentially resulting in a denial of service.

  • What is the severity of CVE-2021-20232?

    CVE-2021-20232 has a severity rating of 7.4, which is considered high.

  • How can I fix CVE-2021-20232 in IBM QRadar SIEM version 7.5.0 GA?

    To fix CVE-2021-20232 in IBM QRadar SIEM version 7.5.0 GA, you should apply the patch available at the following URL: [Patch URL]

  • How can I fix CVE-2021-20232 in IBM QRadar SIEM version 7.4.3 GA - 7.4.3 FP4?

    To fix CVE-2021-20232 in IBM QRadar SIEM version 7.4.3 GA - 7.4.3 FP4, you should apply the patch available at the following URL: [Patch URL]

  • How can I fix CVE-2021-20232 in IBM QRadar SIEM version 7.3.3 GA - 7.3.3 FP10?

    To fix CVE-2021-20232 in IBM QRadar SIEM version 7.3.3 GA - 7.3.3 FP10, you should apply the patch available at the following URL: [Patch URL]

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