ISOMAN

CVE

CVE-2020-24659

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.

Severity
HIGH
CVSS
7.5
Published
Modified
NVD detailAll CVEs

Linked Releases

DistributionReleaseStatusEvidence
Ubuntu20.04.6 amd64 desktopunknownsource
Ubuntu20.04.6 amd64 live-serverunknownsource

References

  1. http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00054.html
  2. http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00060.html
  3. https://gitlab.com/gnutls/gnutls/-/issues/1071
  4. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62BUAI4FQQLG6VTKRT7SUZPGJJ4NASQ3/
  5. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWN56FDLQQXT2D2YHNI4TYH432TDMQ7N/
  6. https://security.gentoo.org/glsa/202009-01
  7. https://security.netapp.com/advisory/ntap-20200911-0006/
  8. https://usn.ubuntu.com/4491-1/
  9. https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04
  10. http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00054.html
  11. http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00060.html
  12. https://gitlab.com/gnutls/gnutls/-/issues/1071
  13. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62BUAI4FQQLG6VTKRT7SUZPGJJ4NASQ3/
  14. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWN56FDLQQXT2D2YHNI4TYH432TDMQ7N/
  15. https://security.gentoo.org/glsa/202009-01
  16. https://security.netapp.com/advisory/ntap-20200911-0006/
  17. https://usn.ubuntu.com/4491-1/
  18. https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04