Use of a Broken or Risky Cryptographic Algorithm

Affecting gnutls package, versions <3.6.14-r0

Report new vulnerabilities
Do your applications use this vulnerable package? Test your applications

Overview

Affected versions of this package are vulnerable to Use of a Broken or Risky Cryptographic Algorithm. GnuTLS 3.6.x before 3.6.14 uses incorrect cryptography for encrypting a session ticket (a loss of confidentiality in TLS 1.2, and an authentication bypass in TLS 1.3). The earliest affected version is 3.6.4 (2018-09-24) because of an error in a 2018-09-18 commit. Until the first key rotation, the TLS server always uses wrong data in place of an encryption key derived from an application.

Remediation

Upgrade gnutls to version or higher.

References

CVSS Score

7.4
high severity
  • Attack Vector
    Network
  • Attack Complexity
    High
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    High
  • Integrity
    High
  • Availability
    None
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVE
CVE-2020-13777
CWE
CWE-327
Snyk ID
SNYK-ALPINE39-GNUTLS-589049
Disclosed
04 Jun, 2020
Published
21 Jul, 2020