CVEvulnerability

CVE-2020-13777

7.4 HIGH Published 2020-06-04 Modified 2026-10-14 Official page ↗
Status
Modified
Published
2020-06-04
Last modified
2026-10-14
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.4 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 2.0 ([email protected])
5.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:N
Weaknesses
CWE-327

Description

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.

Affected configurations

• gnu gnutls (>= 3.6.0 < 3.6.14) • fedoraproject fedora 31 • fedoraproject fedora 32 • canonical ubuntu linux 19.10 • canonical ubuntu linux 20.04 • debian debian linux 10.0

Related

Weakness · CWE (1)

  • CWE-327 Use of a Broken or Risky Cryptographic Algorithm weakness

References