high
7.5
CWE
476 787
Advisory Published
Updated

CVE-2020-24659: Null Pointer Dereference

First published: Fri Sep 04 2020(Updated: )

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.

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

Affected SoftwareAffected VersionHow to fix
GNU GnuTLS<3.6.15
Fedoraproject Fedora=32
Fedoraproject Fedora=33
openSUSE Leap=15.1
openSUSE Leap=15.2
Canonical Ubuntu Linux=20.04
IBM Cloud Pak for Security (CP4S)<=1.5.0.0
IBM Cloud Pak for Security (CP4S)<=1.5.1.0
IBM Cloud Pak for Security (CP4S)<=1.6.0.0
IBM Cloud Pak for Security (CP4S)<=1.6.1.0
IBM Cloud Pak for Security (CP4S)<=1.7.0.0
IBM Cloud Pak for Security (CP4S)<=1.7.1.0
debian/gnutls28
3.7.1-5+deb11u5
3.7.1-5+deb11u6
3.7.9-2+deb12u3
3.8.6-2

Remedy

https://gitlab.com/gnutls/gnutls/-/commit/29ee67c205855e848a0a26e6d0e4f65b6b943e0a

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-24659?

    CVE-2020-24659 is a vulnerability in GnuTLS that can be exploited to cause a denial of service.

  • How severe is CVE-2020-24659?

    CVE-2020-24659 has a severity rating of 7.5 (high).

  • What is the affected software for CVE-2020-24659?

    The affected software for CVE-2020-24659 includes GnuTLS versions up to and including 3.6.15, Ubuntu gnutls28 version 3.6.13-2ubuntu1.3, Fedora 32 and 33, openSUSE Leap 15.1 and 15.2, and Canonical Ubuntu Linux 20.04 LTS.

  • How do I fix CVE-2020-24659?

    To fix CVE-2020-24659, update GnuTLS to version 3.6.15-1 or later.

  • Where can I find more information about CVE-2020-24659?

    You can find more information about CVE-2020-24659 at the following references: [1], [2], [3].

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2024 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203