Vulnerability Assessment & Network Security Forums



If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important.  If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.


Home >> Browse Vulnerability Assessment Database >> Red Hat Local Security Checks >> RHSA-2003-102: openssl


Vulnerability Assessment Details

RHSA-2003-102: openssl

Vulnerability Assessment Summary
Check for the version of the openssl packages

Detailed Explanation for this Vulnerability Assessment


Updated OpenSSL packages are available that fix a potential timing-based
attack and a modified Bleichenbacher attack.

[Updated 30 May 2003]
Added missing i686 packages.

OpenSSL is a commercial-grade, full-featured, open source toolkit that
implements the Secure Sockets Layer (SSL v2/v3) and Transport Layer
Security (TLS v1) protocols, and provides a full-strength general purpose
cryptography library.

Researchers discovered a timing attack on RSA keys. Applications making
use of OpenSSL are generally vulnerable to such an attack, unless RSA
blinding has been turned on. OpenSSL does not use RSA blinding by default
and most applications do not enable RSA blinding.

A local or remote attacker could use this attack to obtain the server's
private key by determining factors using timing differences on (1) the
number of extra reductions during Montgomery reduction, and (2) the use of
different integer multiplication algorithms (Karatsuba and normal).

In order for an attack to be sucessful, a possible hacker must have good
network conditions that permit small changes in timing to be reliably
observed.

Additionally, the SSL and TLS components for OpenSSL permit remote attackers
to perform an unauthorized RSA private key operation via a modified
Bleichenbacher attack. This attack (also known as the Klima-Pokorny-Rosa
attack) uses a large number of SSL or TLS connections using PKCS #1 v1.5
padding to cause OpenSSL to leak information regarding the relationship
between ciphertext and the associated plaintext.

These erratum packages contain a patch provided by the OpenSSL group that
enables RSA blinding by default, and protects against the
Klima-Pokorny-Rosa attack.

Because server applications are affected by these vulnerabilities, we
advise users to restart all services that use OpenSSL functionality or,
alternatively, reboot their systems after installing these updates.




Solution : http://rhn.redhat.com/errata/RHSA-2003-102.html
Network Security Threat Level: High

Networks Security ID:

Vulnerability Assessment Copyright: This script is Copyright (C) 2004 Tenable Network Security

Cables, Connectors

Lot of Two (x2) Dell PowerEdge 1850 550 Watt Server Power Supply AA23300 0JD090
$18.88
Lot of Two (x2) Dell PowerEdge 1850 550 Watt Server Power Supply AA23300 0JD090 pictureDELL POWEREDGE R730 LFF 8 BAY TWO E5-2667V3 3.2GHZ 128GB 5 X 3TB SAS H330
$6729.0
DELL POWEREDGE R730 LFF 8 BAY TWO E5-2667V3 3.2GHZ 128GB 5 X 3TB SAS H330 pictureDELL POWEREDGE R730XD SERVER TWO E5-2667V3 3.2GHZ 8GB 8 X 300GB 15K SAS 8 X 200G
$6799.0
DELL POWEREDGE R730XD SERVER TWO E5-2667V3 3.2GHZ 8GB 8 X 300GB 15K SAS 8 X 200G pictureDELL POWEREDGE R630 10 BAY TWO E5-2697V4 2.3GHZ 384GB 8 X 900GB 10K 12G H730
$12799.0
DELL POWEREDGE R630 10 BAY TWO E5-2697V4 2.3GHZ 384GB 8 X 900GB 10K 12G H730 picture


Discussions

No Discussions have been posted on this vulnerability.