Scientific Linux Security Update : openssl on SL4.x, SL5.x i386/x86_64

Critical Nessus Plugin ID 60921


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


A ciphersuite downgrade flaw was found in the OpenSSL SSL/TLS server code. A remote attacker could possibly use this flaw to change the ciphersuite associated with a cached session stored on the server, if the server enabled the SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG option, possibly forcing the client to use a weaker ciphersuite after resuming the session. (CVE-2010-4180, CVE-2008-7270)

Note: With this update, setting the SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG option has no effect and this bug workaround can no longer be enabled.

It was discovered that OpenSSL did not always check the return value of the bn_wexpand() function. An attacker able to trigger a memory allocation failure in that function could possibly crash an application using the OpenSSL library and its UBSEC hardware engine support. (CVE-2009-3245 - SL4 Only)

For the update to take effect, all services linked to the OpenSSL library must be restarted, or the system rebooted.


Update the affected openssl, openssl-devel and / or openssl-perl packages.

See Also

Plugin Details

Severity: Critical

ID: 60921

File Name: sl_20101213_openssl_on_SL4_x.nasl

Version: $Revision: 1.1 $

Type: local

Agent: unix

Published: 2012/08/01

Modified: 2012/08/01

Dependencies: 12634

Risk Information

Risk Factor: Critical


Base Score: 10

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

Vulnerability Information

CPE: x-cpe:/o:fermilab:scientific_linux

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

Patch Publication Date: 2010/12/13

Reference Information

CVE: CVE-2008-7270, CVE-2009-3245, CVE-2010-4180

CWE: 20