OpenSSL 1.0.2 < 1.0.2w Information Disclosure

medium Nessus Plugin ID 146374
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VPR Score: 1.4

Synopsis

The remote service is affected by an information disclosure vulnerability.

Description

The version of OpenSSL installed on the remote host is 1.0.2 prior to 1.0.2w. It is, therefore, affected by a vulnerability as referenced in the 1.0.2w advisory. The Raccoon attack exploits a flaw in the TLS specification which can lead to an attacker being able to compute the pre-master secret in connections which have used a Diffie-Hellman (DH) based ciphersuite. In such a case this would result in the attacker being able to eavesdrop on all encrypted communications sent over that TLS connection. The attack can only be exploited if an implementation re-uses a DH secret across multiple TLS connections. Note that this issue only impacts DH ciphersuites and not ECDH ciphersuites.

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

Solution

Upgrade to OpenSSL version 1.0.2w or later.

See Also

https://www.openssl.org/news/secadv/20200909.txt

https://www.openssl.org/news/vulnerabilities.html

Plugin Details

Severity: Medium

ID: 146374

File Name: openssl_1_0_2w.nasl

Version: 1.3

Type: remote

Family: Web Servers

Published: 2/10/2021

Updated: 2/11/2021

Dependencies: openssl_version.nasl

Risk Information

Risk Factor: Medium

VPR Score: 1.4

CVSS Score Source: CVE-2020-1968

CVSS v2.0

Base Score: 4.3

Temporal Score: 3.2

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

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

CVSS v3.0

Base Score: 3.7

Temporal Score: 3.2

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

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

Vulnerability Information

CPE: cpe:/a:openssl:openssl

Required KB Items: openssl/port

Exploit Ease: No known exploits are available

Patch Publication Date: 9/9/2020

Vulnerability Publication Date: 9/9/2020

Reference Information

CVE: CVE-2020-1968