RHEL 6 : openssl (RHSA-2011:0677)

critical Nessus Plugin ID 54599

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Synopsis

The remote Red Hat host is missing a security update.

Description

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2011:0677 advisory.

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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 54599

File Name: redhat-RHSA-2011-0677.nasl

Version: 1.21

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 5/20/2011

Updated: 3/20/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2011-0014

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:openssl-devel, p-cpe:/a:redhat:enterprise_linux:openssl-static, p-cpe:/a:redhat:enterprise_linux:openssl, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:redhat:enterprise_linux:openssl-perl

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/19/2011

Vulnerability Publication Date: 2/18/2011

Reference Information

CVE: CVE-2011-0014

BID: 46264

RHSA: 2011:0677

Detections

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