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OpenSSL 1.0.2 < 1.0.2p Multiple Vulnerabilities

medium Nessus Plugin ID 112119

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Synopsis

The remote service is affected by multiple vulnerabilities.

Description

The version of OpenSSL installed on the remote host is prior to 1.0.2p. It is, therefore, affected by multiple vulnerabilities as referenced in the 1.0.2p advisory.

 - During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This could be exploited in a Denial Of Service attack. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o). (CVE-2018-0732)

 - The OpenSSL RSA Key generation algorithm has been shown to be vulnerable to a cache timing side channel attack. An attacker with sufficient access to mount cache timing attacks during the RSA key generation process could recover the private key. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2b-1.0.2o). (CVE-2018-0737)

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

Solution

Upgrade to OpenSSL version 1.0.2p or later.

See Also

http://www.nessus.org/u?050cfd45

http://www.nessus.org/u?5870a79d

https://www.cve.org/CVERecord?id=CVE-2018-0732

https://www.cve.org/CVERecord?id=CVE-2018-0737

https://www.openssl.org/news/secadv/20180612.txt

https://www.openssl.org/news/secadv/20180416.txt

Plugin Details

Severity: Medium

ID: 112119

File Name: openssl_1_0_2p.nasl

Version: 1.6

Type: combined

Agent: windows, macosx, unix

Family: Web Servers

Published: 8/27/2018

Updated: 6/7/2024

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: 3.2

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

CVSS Score Source: CVE-2018-0737

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

CPE: cpe:/a:openssl:openssl

Required KB Items: installed_sw/OpenSSL

Exploit Ease: No known exploits are available

Patch Publication Date: 8/14/2018

Vulnerability Publication Date: 4/16/2018

Reference Information

CVE: CVE-2018-0732, CVE-2018-0737

BID: 103766, 104442