Vulnerability Monitor

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CVE-2020-13777

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.

Published

2020-06-04T07:15:10.000

Last Modified

2024-11-21T05:01:50.330

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.4 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:P/A:N

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: PARTIAL
  • Availability Impact: NONE
Exploitability Score

8.6

Impact Score

4.9

Weaknesses
  • Type: Primary
    CWE-327
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application gnu gnutls < 3.6.14 Yes
Operating System fedoraproject fedora 31 Yes
Operating System fedoraproject fedora 32 Yes
Operating System canonical ubuntu_linux 19.10 Yes
Operating System canonical ubuntu_linux 20.04 Yes
Operating System debian debian_linux 10.0 Yes
References