Debian DLA-2691-1 : libgcrypt20 security update

high Nessus Plugin ID 151006

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Synopsis

The remote Debian host is missing a security update.

Description

An issue has been found in libgcrypt20, a crypto library. Mishandling of ElGamal encryption results in a possible side-channel attack and an interoperability problem with keys not generated by GnuPG/libgcrypt.

For Debian 9 stretch, this problem has been fixed in version 1.7.6-2+deb9u4.

We recommend that you upgrade your libgcrypt20 packages.

For the detailed security status of libgcrypt20 please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/libgcrypt20

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

Plugin Details

Severity: High

ID: 151006

File Name: debian_DLA-2691.nasl

Version: 1.8

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 6/25/2021

Updated: 12/21/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.1

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

CVSS Score Source: CVE-2021-33560

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 7

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libgcrypt-mingw-w64-dev, p-cpe:/a:debian:debian_linux:libgcrypt11-dev, p-cpe:/a:debian:debian_linux:libgcrypt20, p-cpe:/a:debian:debian_linux:libgcrypt20-dev, p-cpe:/a:debian:debian_linux:libgcrypt20-doc, p-cpe:/a:debian:debian_linux:libgcrypt20-udeb, cpe:/o:debian:debian_linux:9.0

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/24/2021

Vulnerability Publication Date: 6/8/2021

Reference Information

CVE: CVE-2021-33560

Detections

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