CVE-2020-11501 — gnutls28 - security update

Description

GnuTLS 3.6.x before 3.6.13 uses incorrect cryptography for DTLS. The earliest affected version is 3.6.3 (2018-07-16) because of an error in a 2017-10-06 commit. The DTLS client always uses 32 '\0' bytes instead of a random value, and thus contributes no randomness to a DTLS negotiation. This breaks the security guarantees of the DTLS protocol.

How to fix CVE-2020-11501

To remediate CVE-2020-11501, upgrade the affected package to a fixed version below.

—upgrade to 3.6.8-r1 or later
—upgrade to 3.6.13-2 or later
—upgrade to 3.6.7-4+deb10u3 or later

Is CVE-2020-11501 being exploited?

Moderate — EPSS is 11.5%. Track this CVE but it's not at the top of the prioritisation list.

Affected packages (3)

from 0, < 3.6.8-r1
from 0, < 3.6.13-2
from 0, < 3.6.7-4+deb10u3

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

References (2)

ADVISORYsecurity.alpinelinux.org/vuln/CVE-2020-11501
ADVISORYsecurity-tracker.debian.org/tracker/CVE-2020-11501