OpenSSL 1.0.1 < 1.0.1c TLS/DTLS CBC Denial of Service

medium Nessus Plugin ID 59078
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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 1.0.1 earlier than 1.0.1c. 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, TLS/DTLS record length values and explicit initialization vector length values related to TLS/DTLS packets are not handled properly, which can lead to memory corruption and application crashes.

Solution

Upgrade to OpenSSL 1.0.1c or later.

See Also

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

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

http://cvs.openssl.org/chngview?cn=22547

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

Plugin Details

Severity: Medium

ID: 59078

File Name: openssl_1_0_1c.nasl

Version: 1.8

Type: remote

Family: Web Servers

Published: 5/11/2012

Updated: 11/15/2018

Dependencies: openssl_version.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

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

Vulnerability Information

CPE: cpe:/a:openssl:openssl

Required KB Items: openssl/port

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