CVE-2020-13777
high
CVSS v3
—
CVSS v2
—
VIR risk
8.0
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.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-13777
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-13777.html
Vendor advisory: arch — https://security.archlinux.org/ASA-202006-2
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 3.6.14-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 3.6.14-1 |
| debian | bullseye | fixed | 3.6.14-1 |
| debian | forky | fixed | 3.6.14-1 |
| debian | sid | fixed | 3.6.14-1 |
| debian | trixie | fixed | 3.6.14-1 |
References
Verify integrity in audit chain (admin only). AS-IS.