CentOS 3 / 4 : openssl096b (CESA-2005:830)

Medium Nessus Plugin ID 21870

Synopsis

The remote CentOS host is missing a security update.

Description

Updated OpenSSL096b compatibility packages that fix a remote denial of service vulnerability are now available.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

The OpenSSL toolkit implements Secure Sockets Layer (SSL v2/v3), Transport Layer Security (TLS v1) protocols, and serves as a full-strength general purpose cryptography library. OpenSSL 0.9.6b libraries are provided for Red Hat Enterprise Linux 3 and 4 to allow compatibility with legacy applications.

Testing performed by the OpenSSL group using the Codenomicon TLS Test Tool uncovered a NULL pointer assignment in the do_change_cipher_spec() function. A remote attacker could perform a carefully crafted SSL/TLS handshake against a server that uses the OpenSSL library in such a way as to cause OpenSSL to crash. Depending on the server this could lead to a denial of service. (CVE-2004-0079)

This issue was reported as not affecting OpenSSL versions prior to 0.9.6c, and testing with the Codenomicon Test Tool showed that OpenSSL 0.9.6b as shipped as a compatibility library with Red Hat Enterprise Linux 3 and 4 did not crash. However, an alternative reproducer has been written which shows that this issue does affect versions of OpenSSL prior to 0.9.6c.

Note that Red Hat does not ship any applications with Red Hat Enterprise Linux 3 or 4 that use these compatibility libraries.

Users of the OpenSSL096b compatibility package are advised to upgrade to these updated packages, which contain a patch provided by the OpenSSL group that protect against this issue.

Solution

Update the affected openssl096b package.

See Also

http://www.nessus.org/u?4dad2955

http://www.nessus.org/u?a0a9eed0

http://www.nessus.org/u?121e2d2d

http://www.nessus.org/u?6d9aeddb

http://www.nessus.org/u?dfdafd39

http://www.nessus.org/u?3914e401

Plugin Details

Severity: Medium

ID: 21870

File Name: centos_RHSA-2005-830.nasl

Version: 1.19

Type: local

Agent: unix

Published: 2006/07/03

Updated: 2019/10/25

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

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

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

Vulnerability Information

CPE: p-cpe:/a:centos:centos:openssl096b, cpe:/o:centos:centos:3, cpe:/o:centos:centos:4

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2005/11/02

Vulnerability Publication Date: 2004/11/23

Reference Information

CVE: CVE-2004-0079

BID: 9899

RHSA: 2005:830