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SUSE SLES15 Security Update : openssl-1_1 (SUSE-SU-2021:0955-2)

medium Nessus Plugin ID 163092

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Synopsis

The remote SUSE host is missing a security update.

Description

The remote SUSE Linux SLES15 host has packages installed that are affected by a vulnerability as referenced in the SUSE- SU-2021:0955-2 advisory.

 - An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j). (CVE-2021-3449)

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

Solution

Update the affected packages.

See Also

https://bugzilla.suse.com/1183852

https://www.suse.com/security/cve/CVE-2021-3449

http://www.nessus.org/u?2a2b4b02

Plugin Details

Severity: Medium

ID: 163092

File Name: suse_SU-2021-0955-2.nasl

Version: 1.5

Type: local

Agent: unix

Published: 7/14/2022

Updated: 7/13/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.1

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.6

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

CVSS Score Source: CVE-2021-3449

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.5

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:libopenssl-1_1-devel, p-cpe:/a:novell:suse_linux:libopenssl1_1-hmac, p-cpe:/a:novell:suse_linux:openssl-1_1, p-cpe:/a:novell:suse_linux:libopenssl-1_1-devel-32bit, p-cpe:/a:novell:suse_linux:libopenssl1_1-hmac-32bit, p-cpe:/a:novell:suse_linux:openssl-1_1-doc, p-cpe:/a:novell:suse_linux:libopenssl1_1, p-cpe:/a:novell:suse_linux:libopenssl1_1-32bit, cpe:/o:novell:suse_linux:15

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/13/2022

Vulnerability Publication Date: 3/25/2021

Reference Information

CVE: CVE-2021-3449

SuSE: SUSE-SU-2021:0955-2