Debian DSA-4855-1 : openssl - security update

medium Nessus Plugin ID 146599
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Synopsis

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

Description

Multiple vulnerabilities have been discovered in OpenSSL, a Secure Sockets Layer toolkit. An overflow bug in the x64_64 Montgomery squaring procedure, an integer overflow in CipherUpdate and a NULL pointer dereference flaw X509_issuer_and_serial_hash() were found, which could result in denial of service.

Additional details can be found in the upstream advisories https://www.openssl.org/news/secadv/20191206.txt and https://www.openssl.org/news/secadv/20210216.txt.

Solution

Upgrade the openssl packages.

For the stable distribution (buster), these problems have been fixed in version 1.1.1d-0+deb10u5.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=947949

https://www.openssl.org/news/secadv/20191206.txt

https://www.openssl.org/news/secadv/20210216.txt

https://security-tracker.debian.org/tracker/source-package/openssl

https://packages.debian.org/source/buster/openssl

https://www.debian.org/security/2021/dsa-4855

Plugin Details

Severity: Medium

ID: 146599

File Name: debian_DSA-4855.nasl

Version: 1.2

Type: local

Agent: unix

Published: 2/19/2021

Updated: 2/23/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:openssl, 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: 2/17/2021

Vulnerability Publication Date: 12/6/2019

Reference Information

CVE: CVE-2019-1551, CVE-2021-23840, CVE-2021-23841

DSA: 4855