CVE-2020-13777
gnutls28 - security update
7.4
HIGH
CVSS 3.1
EPSS 1.2%
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.
How to fix CVE-2020-13777
To remediate CVE-2020-13777, upgrade the affected package to a fixed version below.
- —upgrade to 3.6.14-r0 or later
- —upgrade to 3.6.14-1 or later
- —upgrade to 3.6.7-4+deb10u4 or later
Is CVE-2020-13777 being exploited?
Low — EPSS is 1.2%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 3.6.14-r0
- from 0, < 3.6.14-1
- from 0, < 3.6.7-4+deb10u4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |