Debian DSA-4963-1 : openssl - security update

critical Nessus Plugin ID 152783

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 10 / 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-4963 advisory.

Multiple vulnerabilities have been discovered in OpenSSL, a Secure Sockets Layer toolkit. CVE-2021-3711 John Ouyang reported a buffer overflow vulnerability in the SM2 decryption. An attacker able to present SM2 content for decryption to an application can take advantage of this flaw to change application behaviour or cause the application to crash (denial of service). CVE-2021-3712 Ingo Schwarze reported a buffer overrun flaw when processing ASN.1 strings in the X509_aux_print() function, which can result in denial of service. Additional details can be found in the upstream advisory:
https://www.openssl.org/news/secadv/20210824.txt For the oldstable distribution (buster), these problems have been fixed in version 1.1.1d-0+deb10u7. For the stable distribution (bullseye), these problems have been fixed in version 1.1.1k-1+deb11u1. We recommend that you upgrade your openssl packages. For the detailed security status of openssl please refer to its security tracker page at: https://security- tracker.debian.org/tracker/openssl

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the openssl packages.

For the stable distribution (bullseye), these problems have been fixed in version 1.1.1k-1+deb11u1.

Plugin Details

Severity: Critical

ID: 152783

File Name: debian_DSA-4963.nasl

Version: 1.8

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 8/24/2021

Updated: 1/24/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2021-3711

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:libssl-dev, p-cpe:/a:debian:debian_linux:libssl1.1-udeb, p-cpe:/a:debian:debian_linux:libssl-doc, p-cpe:/a:debian:debian_linux:libssl1.1, p-cpe:/a:debian:debian_linux:openssl, p-cpe:/a:debian:debian_linux:libcrypto1.1-udeb

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: 8/24/2021

Vulnerability Publication Date: 2/16/2021

Reference Information

CVE: CVE-2021-3711, CVE-2021-3712

IAVA: 2021-A-0395-S

Detections

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