Debian DSA-4697-1 : gnutls28 - security update

high Nessus Plugin ID 137209

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Synopsis

The remote Debian host is missing a security-related update.

Description

A flaw was reported in the TLS session ticket key construction in GnuTLS, a library implementing the TLS and SSL protocols. The flaw caused the TLS server to not securely construct a session ticket encryption key considering the application supplied secret, allowing a man-in-the-middle attacker to bypass authentication in TLS 1.3 and recover previous conversations in TLS 1.2.

Solution

Upgrade the gnutls28 packages.

For the stable distribution (buster), this problem has been fixed in version 3.6.7-4+deb10u4.

Plugin Details

Severity: High

ID: 137209

File Name: debian_DSA-4697.nasl

Version: 1.3

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 6/8/2020

Updated: 6/12/2020

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2020-13777

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.4

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:gnutls28, cpe:/o:debian:debian_linux:10.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 6/6/2020

Vulnerability Publication Date: 6/4/2020

Reference Information

CVE: CVE-2020-13777

DSA: 4697

Detections

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