CVE-2020-13777
HIGH 7.4EPSS 17.5%
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.
- CVSS v3.1
- 7.4 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - CVSS v2.0
- 5.8 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:N - EPSS
- 17.51% chance of exploitation in the next 30 days, 97th percentile
- Published
- 2020-06-04
- Updated
- 2024-08-04
Proof-of-concept exploits (2)
- 0xxon/cve-2020-137774★ · 2025-09-17
- prprhyt/PoC_TLS1_3_CVE-2020-137770★ · 2020-10-27