Out-of-bounds Write

Affecting gnutls28 package, versions *

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Overview

Affected versions of this package are vulnerable to Out-of-bounds Write. 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.

Remediation

There is no fixed version for gnutls28.

References

CVSS Score

7.5
high severity
  • Attack Vector
    Network
  • Attack Complexity
    Low
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    None
  • Integrity
    None
  • Availability
    High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVE
CVE-2020-24659
CWE
CWE-476 CWE-787
Snyk ID
SNYK-DEBIAN10-GNUTLS28-609778
Disclosed
04 Sep, 2020
Published
05 Sep, 2020