Scientific Linux Security Update : openssl on SL5.x, SL6.x i386/x86_64

This script is Copyright (C) 2013-2014 Tenable Network Security, Inc.


Synopsis :

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

Description :

It was discovered that OpenSSL leaked timing information when
decrypting TLS/SSL and DTLS protocol encrypted records when CBC-mode
cipher suites were used. A remote attacker could possibly use this
flaw to retrieve plain text from the encrypted packets by using a
TLS/SSL or DTLS server as a padding oracle. (CVE-2013-0169)

A NULL pointer dereference flaw was found in the OCSP response
verification in OpenSSL. A malicious OCSP server could use this flaw
to crash applications performing OCSP verification by sending a
specially- crafted response. (CVE-2013-0166)

It was discovered that the TLS/SSL protocol could leak information
about plain text when optional compression was used. An attacker able
to control part of the plain text sent over an encrypted TLS/SSL
connection could possibly use this flaw to recover other portions of
the plain text. (CVE-2012-4929)

Note: This update disables zlib compression, which was previously
enabled in OpenSSL by default. Applications using OpenSSL now need to
explicitly enable zlib compression to use it.

It was found that OpenSSL read certain environment variables even when
used by a privileged (setuid or setgid) application. A local attacker
could use this flaw to escalate their privileges. No application
shipped with Scientific Linux 5 and 6 was affected by this problem.

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?ce01dbaf

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: 65022 ()

Bugtraq ID:

CVE ID: CVE-2012-4929
CVE-2013-0166
CVE-2013-0169