Detections
Analytics

OpenSSL 1.0.1 < 1.0.1o / 1.0.2 < 1.0.2c ASN.1 Encoder Negative Zero Value Handling RCE

critical Nessus Network Monitor Plugin ID 9389

Synopsis

The remote web server is running an outdated instance of OpenSSL and that is affected by a buffer underflow vulnerability.

Description

According to its banner, the version of OpenSSL on the remote host is 1.0.1 prior to 1.0.1o, or 1.0.2 prior to 1.0.2c. It is therefore affected by an underflow condition in the ASN.1 encoder that is triggered when attempting to encode the value zero represented as a negative integer. This may allow a remote attacker to corrupt memory and potentially execute arbitrary code.

Solution

Upgrade OpenSSL to version 1.0.1o or 1.0.2c

See Also

https://www.openssl.org/news/secadv/20160503.txt

Plugin Details

Severity: Critical

ID: 9389

Family: Web Servers

Published: 7/8/2016

Updated: 3/6/2019

Nessus ID: 90888, 90889

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.7

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

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.4

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

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

Vulnerability Information

CPE: cpe:/a:openssl:openssl

Patch Publication Date: 6/11/2015

Vulnerability Publication Date: 5/3/2016

Reference Information

CVE: CVE-2016-2108

BID: 89752