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Out-of-bounds Write Affecting gnutls28 package, versions <3.6.13-2ubuntu1.3

medium

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.39% (73rd percentile)
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NVD
7.5 high
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SUSE
5.9 medium
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Red Hat
7.5 high

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  • Snyk ID SNYK-UBUNTU2004-GNUTLS28-609972
  • published 4 Sep 2020
  • disclosed 4 Sep 2020
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Introduced: 4 Sep 2020

CVE-2020-24659 Open this link in a new tab
CWE-787 Open this link in a new tab
CWE-476 Open this link in a new tab

How to fix?

Upgrade Ubuntu:20.04 gnutls28 to version 3.6.13-2ubuntu1.3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gnutls28 package and not the gnutls28 package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure.

References