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Vulnerability · Published Jun 4, 2020 · Assigned by mitre

CVE-2020-13777

High 7.4

In plain English

A high-severity security flaw in the gnutls package (Alpine). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 22.5% (higher than 98% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.4High
Exploit odds (30 days)22.5%top 2.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Public PoC

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20gnutls3.6.14-r0ALPINE-CVE-2020-13777
Alpine:v3.21gnutls3.6.14-r0ALPINE-CVE-2020-13777
Alpine:v3.22gnutls3.6.14-r0ALPINE-CVE-2020-13777
Alpine:v3.23gnutls3.6.14-r0ALPINE-CVE-2020-13777
Alpine:v3.24gnutls3.6.14-r0ALPINE-CVE-2020-13777
Debian:12gnutls283.6.14-1DEBIAN-CVE-2020-13777
Debian:13gnutls283.6.14-1DEBIAN-CVE-2020-13777
Debian:14gnutls283.6.14-1DEBIAN-CVE-2020-13777

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References