Detections
Analytics

Tenable.sc 5.16.0 / 5.17.0 OpenSSL DoS (TNS-2021-06)

medium Nessus Plugin ID 148404

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Synopsis

An application installed on the remote host is affected by a denial of service vulnerability.

Description

According to its self-reported version, the Tenable.sc application installed on the remote host is version 5.16.0 or 5.17.0 and affected by the following OpenSSL denial of service vulnerability:

 - 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

Install Tenable.sc Patch SC-202104.1 or update to version 5.18.0 or later.

See Also

https://www.tenable.com/security/tns-2021-06

http://www.nessus.org/u?c531f5e9

Plugin Details

Severity: Medium

ID: 148404

File Name: securitycenter_5_17_0_tns_2021_06.nasl

Version: 1.14

Type: local

Agent: unix

Family: Misc.

Published: 4/9/2021

Updated: 1/5/2024

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.4

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: 5.3

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:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:tenable:securitycenter

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/5/2021

Vulnerability Publication Date: 3/25/2021

Reference Information

CVE: CVE-2021-3449

IAVA: 2021-A-0149-S