OpenSSL 1.0.2 < 1.0.2j Multiple DoS

medium Nessus Network Monitor Plugin ID 9627
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Synopsis

The remote web server is running an outdated instance of OpenSSL and that is affected by multiple Denial of Service (DoS) vulnerabilities.

Description

According to its banner, the version of OpenSSL on the remote host is 1.0.2 prior to 1.0.2j and is affected by multiple DoS vulnerabilities :

- A flaw exists in the CRL functionality that is triggered when handling a certificate revocation list (CRL). With a specially crafted CRL, a context-dependent attacker can cause the service to crash due to a NULL pointer being dereferenced. (CVE-2016-7052)
- A flaw exists that is triggered when handling many consecutive 'SSL3_AL_WARNING' undefined alerts. By continuously sending warning alerts, a remote attacker can cause a process linked against the library to exhaust available CPU resources and potentially stop responding. (CVE-2016-8610)

Solution

Upgrade OpenSSL to version 1.0.2j or higher.

See Also

https://www.openssl.org/news/secadv/20160926.txt

https://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=af58be768ebb690f78530f796e92b8ae5c9a4401

Plugin Details

Severity: Medium

ID: 9627

Family: Web Servers

Published: 10/6/2016

Updated: 3/6/2019

Dependencies: 5563

Nessus ID: 93786

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.1

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

Temporal Vector: CVSS2#E:F/RL:OF/RC:C

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.9

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

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

Vulnerability Information

CPE: cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*

Patch Publication Date: 9/26/2016

Vulnerability Publication Date: 9/26/2016

Reference Information

CVE: CVE-2016-8610, CVE-2016-7052

BID: 93841, 93171