OpenSSL 0.9.8 < 0.9.8x DTLS CBC Denial of Service

medium Nessus Plugin ID 59076

Synopsis

The remote host may be affected by a denial of service vulnerability.

Description

According to its banner, the remote web server is running a version of OpenSSL 0.9.8 earlier than 0.9.8x. As such, the OpenSSL library itself is reportedly affected by a denial of service vulnerability.

An integer underflow error exists in the file 'ssl/d1_enc.c' in the function 'dtls1_enc'. When in CBC mode, DTLS record length values and explicit initialization vector length values related to DTLS packets are not handled properly, which can lead to memory corruption and application crashes.

Solution

Upgrade to OpenSSL 0.9.8x or later.

See Also

https://bugzilla.redhat.com/show_bug.cgi?id=820686

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

http://cvs.openssl.org/chngview?cn=22538

https://www.openssl.org/news/secadv/20120510.txt

Plugin Details

Severity: Medium

ID: 59076

File Name: openssl_0_9_8x.nasl

Version: 1.10

Type: combined

Agent: windows, macosx, unix

Family: Web Servers

Published: 5/11/2012

Updated: 8/22/2023

Supported Sensors: Nessus Agent

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2012-2333

Vulnerability Information

CPE: cpe:/a:openssl:openssl

Required KB Items: installed_sw/OpenSSL

Exploit Ease: No known exploits are available

Patch Publication Date: 5/10/2012

Vulnerability Publication Date: 5/10/2012

Reference Information

CVE: CVE-2012-2333

BID: 53476