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(Red Hat Issues Fix) OpenSSL Bugs Let Remote Users Deny Service, Obtain Information, and Potentially Execute Arbitrary Code
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SecurityTracker Alert ID: 1026577 |
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SecurityTracker URL: http://securitytracker.com/id/1026577
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CVE Reference:
CVE-2011-4108, CVE-2011-4109, CVE-2011-4576, CVE-2011-4619
(Links to External Site)
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Date: Jan 25 2012
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Impact:
Denial of service via network, Disclosure of user information, Execution of arbitrary code via network, User access via network
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): prior to 0.9.8s; 1.x prior to 1.0.0f
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Description:
Several vulnerabilities were reported in OpenSSL. A remote user can cause denial of service conditions. A remote user can obtain sensitive information. A remote user may be able to execute arbitrary code on the target system.
A remote user can conduct an efficient plaintext recovery attack against the OpenSSL implementation of Datagram Transport Layer Security (DTLS) [CVE-2011-4108, CVE-2012-0390]. Nadhem Alfardan and Kenny Paterson of the Information Security Group at Royal Holloway, University of London (www.isg.rhul.ac.uk) reported this vulnerability.
A remote user can trigger a double-free memory error when a policy check fails [CVE-2011-4109]. Version 0.9.8 systems with the X509_V_FLAG_POLICY_CHECK set are affected. Ben Laurie reported this vulnerability.
The bytes used as block cipher padding in SSL 3.0 records are not cleared. A remote user may be able to conduct a SSL 3.0 handshake to obtain memory contents [CVE-2011-4576]. Adam Langley reported this vulnerability.
Specially crafted RFC 3779 data within a certificate may cause an assertion failure [CVE-2011-4577]. System builds configured with "enable-rfc3779" are affected. Andrew Chi, BBN Technologies, reported this vulnerability.
A remote user can exploit a flaw in handshake restarts for server gated cryptography (SGC) to cause denial of service conditions on the target system [CVE-2011-4619]. Adam Langley reported this vulnerability.
A remote user can send specially crafted GOST parameters to cause the target server to crash [CVE-2012-0027]. OpenSSL GOST ENGINE users are affected. Andrey Kulikov reported this vulnerability.
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Impact:
A remote user may be able to execute arbitrary code on the target system.
A remote user can cause the target server to crash.
A remote user can obtain plaintext in certain cases.
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Solution:
Red Hat has issued a fix for CVE-2011-4108, CVE-2011-4109, CVE-2011-4576, and CVE-2011-4619.
The Red Hat advisory is available at:
https://rhn.redhat.com/errata/RHSA-2012-0060.html
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Vendor URL: openssl.org/news/secadv_20120104.txt (Links to External Site)
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Cause:
Access control error, Exception handling error, Input validation error, State error
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Underlying OS:
Linux (Red Hat Enterprise)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Tue, 24 Jan 2012 21:38:14 +0000
Subject: [RHSA-2012:0060-01] Moderate: openssl security update
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Moderate: openssl security update
Advisory ID: RHSA-2012:0060-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0060.html
Issue date: 2012-01-24
CVE Names: CVE-2011-4108 CVE-2011-4109 CVE-2011-4576
CVE-2011-4619
=====================================================================
1. Summary:
Updated openssl packages that fix multiple security issues are now
available for Red Hat Enterprise Linux 5.
The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.
2. Relevant releases/architectures:
RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
3. 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.
It was discovered that the Datagram Transport Layer Security (DTLS)
protocol implementation in OpenSSL leaked timing information when
performing certain operations. A remote attacker could possibly use this
flaw to retrieve plain text from the encrypted packets by using a DTLS
server as a padding oracle. (CVE-2011-4108)
A double free flaw was discovered in the policy checking code in OpenSSL.
A remote attacker could use this flaw to crash an application that uses
OpenSSL by providing an X.509 certificate that has specially-crafted
policy extension data. (CVE-2011-4109)
An information leak flaw was found in the SSL 3.0 protocol implementation
in OpenSSL. Incorrect initialization of SSL record padding bytes could
cause an SSL client or server to send a limited amount of possibly
sensitive data to its SSL peer via the encrypted connection.
(CVE-2011-4576)
It was discovered that OpenSSL did not limit the number of TLS/SSL
handshake restarts required to support Server Gated Cryptography. A remote
attacker could use this flaw to make a TLS/SSL server using OpenSSL consume
an excessive amount of CPU by continuously restarting the handshake.
(CVE-2011-4619)
All OpenSSL users should upgrade to these updated packages, which contain
backported patches to resolve these issues. For the update to take effect,
all services linked to the OpenSSL library must be restarted, or the system
rebooted.
4. Solution:
Before applying this update, make sure all previously-released errata
relevant to your system have been applied.
This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259
5. Bugs fixed (http://bugzilla.redhat.com/):
771770 - CVE-2011-4108 openssl: DTLS plaintext recovery attack
771771 - CVE-2011-4109 openssl: double-free in policy checks
771775 - CVE-2011-4576 openssl: uninitialized SSL 3.0 padding
771780 - CVE-2011-4619 openssl: SGC restart DoS attack
6. Package List:
Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/openssl-0.9.8e-20.el5_7.1.src.rpm
i386:
openssl-0.9.8e-20.el5_7.1.i386.rpm
openssl-0.9.8e-20.el5_7.1.i686.rpm
openssl-debuginfo-0.9.8e-20.el5_7.1.i386.rpm
openssl-debuginfo-0.9.8e-20.el5_7.1.i686.rpm
openssl-perl-0.9.8e-20.el5_7.1.i386.rpm
x86_64:
openssl-0.9.8e-20.el5_7.1.i686.rpm
openssl-0.9.8e-20.el5_7.1.x86_64.rpm
openssl-debuginfo-0.9.8e-20.el5_7.1.i686.rpm
openssl-debuginfo-0.9.8e-20.el5_7.1.x86_64.rpm
openssl-perl-0.9.8e-20.el5_7.1.x86_64.rpm
RHEL Desktop Workstation (v. 5 client):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/openssl-0.9.8e-20.el5_7.1.src.rpm
i386:
openssl-debuginfo-0.9.8e-20.el5_7.1.i386.rpm
openssl-devel-0.9.8e-20.el5_7.1.i386.rpm
x86_64:
openssl-debuginfo-0.9.8e-20.el5_7.1.i386.rpm
openssl-debuginfo-0.9.8e-20.el5_7.1.x86_64.rpm
openssl-devel-0.9.8e-20.el5_7.1.i386.rpm
openssl-devel-0.9.8e-20.el5_7.1.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/openssl-0.9.8e-20.el5_7.1.src.rpm
i386:
openssl-0.9.8e-20.el5_7.1.i386.rpm
openssl-0.9.8e-20.el5_7.1.i686.rpm
openssl-debuginfo-0.9.8e-20.el5_7.1.i386.rpm
openssl-debuginfo-0.9.8e-20.el5_7.1.i686.rpm
openssl-devel-0.9.8e-20.el5_7.1.i386.rpm
openssl-perl-0.9.8e-20.el5_7.1.i386.rpm
ia64:
openssl-0.9.8e-20.el5_7.1.i686.rpm
openssl-0.9.8e-20.el5_7.1.ia64.rpm
openssl-debuginfo-0.9.8e-20.el5_7.1.i686.rpm
openssl-debuginfo-0.9.8e-20.el5_7.1.ia64.rpm
openssl-devel-0.9.8e-20.el5_7.1.ia64.rpm
openssl-perl-0.9.8e-20.el5_7.1.ia64.rpm
ppc:
openssl-0.9.8e-20.el5_7.1.ppc.rpm
openssl-0.9.8e-20.el5_7.1.ppc64.rpm
openssl-debuginfo-0.9.8e-20.el5_7.1.ppc.rpm
openssl-debuginfo-0.9.8e-20.el5_7.1.ppc64.rpm
openssl-devel-0.9.8e-20.el5_7.1.ppc.rpm
openssl-devel-0.9.8e-20.el5_7.1.ppc64.rpm
openssl-perl-0.9.8e-20.el5_7.1.ppc.rpm
s390x:
openssl-0.9.8e-20.el5_7.1.s390.rpm
openssl-0.9.8e-20.el5_7.1.s390x.rpm
openssl-debuginfo-0.9.8e-20.el5_7.1.s390.rpm
openssl-debuginfo-0.9.8e-20.el5_7.1.s390x.rpm
openssl-devel-0.9.8e-20.el5_7.1.s390.rpm
openssl-devel-0.9.8e-20.el5_7.1.s390x.rpm
openssl-perl-0.9.8e-20.el5_7.1.s390x.rpm
x86_64:
openssl-0.9.8e-20.el5_7.1.i686.rpm
openssl-0.9.8e-20.el5_7.1.x86_64.rpm
openssl-debuginfo-0.9.8e-20.el5_7.1.i386.rpm
openssl-debuginfo-0.9.8e-20.el5_7.1.i686.rpm
openssl-debuginfo-0.9.8e-20.el5_7.1.x86_64.rpm
openssl-devel-0.9.8e-20.el5_7.1.i386.rpm
openssl-devel-0.9.8e-20.el5_7.1.x86_64.rpm
openssl-perl-0.9.8e-20.el5_7.1.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package
7. References:
https://www.redhat.com/security/data/cve/CVE-2011-4108.html
https://www.redhat.com/security/data/cve/CVE-2011-4109.html
https://www.redhat.com/security/data/cve/CVE-2011-4576.html
https://www.redhat.com/security/data/cve/CVE-2011-4619.html
https://access.redhat.com/security/updates/classification/#moderate
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2012 Red Hat, Inc.
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