Scientific Linux Security Update : openssl on SL6.x i386/x86_64

This script is Copyright (C) 2012 Tenable Network Security, Inc.


Synopsis :

The remote Scientific Linux host is missing one or more security
updates.

Description :

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL
v2/v3) and Transport Layer Security (TLS v1) protocols, as well as a
full-strength, general purpose cryptography library.

A buffer over-read flaw was discovered in the way OpenSSL parsed the
Certificate Status Request TLS extensions in ClientHello TLS handshake
messages. A remote attacker could possibly use this flaw to crash an
SSL server using the affected OpenSSL functionality. (CVE-2011-0014)

This update fixes the following bugs :

- The 'openssl speed' command (which provides algorithm
speed measurement) failed when openssl was running in
FIPS (Federal Information Processing Standards) mode,
even if testing of FIPS approved algorithms was
requested. FIPS mode disables ciphers and cryptographic
hash algorithms that are not approved by the NIST
(National Institute of Standards and Technology)
standards. With this update, the 'openssl speed' command
no longer fails. (BZ#619762)

- The 'openssl pkcs12 -export' command failed to export a
PKCS#12 file in FIPS mode. The default algorithm for
encrypting a certificate in the PKCS#12 file was not
FIPS approved and thus did not work. The command now
uses a FIPS approved algorithm by default in FIPS mode.
(BZ#673453)

This update also adds the following enhancements :

- The 'openssl s_server' command, which previously
accepted connections only over IPv4, now accepts
connections over IPv6. (BZ#601612)

- For the purpose of allowing certain maintenance commands
to be run (such as 'rsync'), an
'OPENSSL_FIPS_NON_APPROVED_MD5_ALLOW' environment
variable has been added. When a system is configured for
FIPS mode and is in a maintenance state, this newly
added environment variable can be set to allow software
that requires the use of an MD5 cryptographic hash
algorithm to be run, even though the hash algorithm is
not approved by the FIPS-140-2 standard. (BZ#673071)

Users of OpenSSL are advised to upgrade to these updated packages,
which contain backported patches to resolve these issues and add these
enhancements. For the update to take effect, all services linked to
the OpenSSL library must be restarted, or the system rebooted.

See also :

http://www.nessus.org/u?749187f9
https://bugzilla.redhat.com/show_bug.cgi?id=601612
https://bugzilla.redhat.com/show_bug.cgi?id=619762
https://bugzilla.redhat.com/show_bug.cgi?id=673071
https://bugzilla.redhat.com/show_bug.cgi?id=673453

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 61043 ()

Bugtraq ID:

CVE ID: CVE-2011-0014