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Vulnerability Alert

OpenSSL DTLS Handshake Processing Recursion Denial of Service Vulnerability

 
Threat Type:CWE-399: Resource Management Errors
IntelliShield ID:34547
Version:8
First Published:2014 June 05 15:49 GMT
Last Published:2014 July 09 13:03 GMT
Port: Not available
CVE:CVE-2014-0221
BugTraq ID:67901
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:4.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:3.2
 
Version Summary:HP has released an additional security bulletin and software updates to address the OpenSSL DTLS handshake processing recursion denial of service vulnerability.
 
 
Description
A vulnerability in OpenSSL could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.

The vulnerability is due to improper handling of certain Datagram Transport Layer Security (DTLS) ServerHello requests by a system running the affected application. An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted DTLS handshake request to a targeted system. A successful exploit could cause the affected application to recurse and crash, resulting in a DoS condition.

OpenSSL has confirmed the vulnerability and released software updates.
 
Warning Indicators
The following OpenSSL versions are affected:
  • OpenSSL versions prior to 0.9.8za
  • OpenSSL versions prior to 1.0.0m
  • OpenSSL versions prior to 1.0.1h
 
IntelliShield Analysis
To exploit this vulnerability, an attacker would need to send a crafted DTLS handshake request to the targeted device. Depending on where the targeted system resides in an environment, an attacker may need to bypass firewall restrictions or other protection measures, which may reduce the likelihood of a successful exploit.

Systems that have applications using OpenSSL as a DTLS client are affected by this vulnerability.
 
Vendor Announcements
OpenSSL.org has released a security advisory at the following link: CVE-2014-0221

BlackBerry has released a security advisory at the following link: KB36051

Blue Coat has released a security advisory at the following link: SA80

FreeBSD has released a security advisory at the following link: FreeBSD-SA-14:14.openssl

HP has released security bulletins c04336637, c04337774, and c04363613 at the following links: HPSBUX03046 SSRT101590, HPSBOV03047, and HPSBMU03065 SSRT101630

Oracle has released a security blog at the following link: CVE-2014-0221

Red Hat has released an official CVE statement and a security advisory for bug 1103593 at the following links:
CVE-2014-0221, RHSA-2014:0625, RHSA-2014:0628, and RHSA-2014:0679
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to cause an affected application to recurse and crash, resulting in a DoS condition.
 
Technical Information
The vulnerability is due to improper handling of certain DTLS ServerHello requests by a system running an affected version of OpenSSL.

An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted DTLS handshake request to a targeted system. A successful exploit could cause the affected application to recurse and crash, resulting in a DoS condition.
 
Safeguards
Administrators are advised to apply the appropriate updates.

Administrators are advised to allow only trusted users to have network access.

Administrators can help protect affected systems from external attacks by using a solid firewall strategy.

Administrators are advised to monitor affected systems.
 
Patches/Software
OpenSSL.org has released software updates at the following link: OpenSSL

BlackBerry customers are advised to follow the resolution steps mentioned in the vendor advisory to mitigate this vulnerability.

FreeBSD has released a patch and instructions for installing the patch in the security advisory, which is linked from the "Vendor Announcements" section of this alert.

HP has released software updates at the following links:
Oracle has released updated software for registered customers at the following link: Solaris 11.1.20.5.0

Red Hat has released updated software for registered subscribers at the following link: Red Hat Network. Red Hat packages can be updated on Red Hat Enterprise Linux versions 5 and later using the yum tool.

 
Alert History
 

Version 7, June 25, 2014, 9:05 AM: BlackBerry has released a security advisory and updated software to address the OpenSSL DTLS handshake processing recursion denial of service vulnerability.

Version 6, June 24, 2014, 8:47 AM: Oracle has released a security blog and software updates to address the OpenSSL DTLS handshake processing recursion denial of service vulnerability.

Version 5, June 19, 2014, 8:31 AM: HP has released an additional security bulletin and software updates to address the OpenSSL DTLS handshake processing recursion denial of service vulnerability.

Version 4, June 13, 2014, 10:42 AM: HP has released a security bulletin and software updates to address the OpenSSL DTLS handshake processing recursion denial of service vulnerability.

Version 3, June 11, 2014, 10:04 AM: Red Hat has released an additional security advisory and software updates to address the OpenSSL DTLS handshake processing recursion denial of service vulnerability.

Version 2, June 9, 2014, 11:06 AM: Blue Coat has released a security advisory and software updates to address the OpenSSL DTLS handshake processing recursion denial of service vulnerability.

Version 1, June 5, 2014, 11:49 AM: OpenSSL contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition on a targeted system. Updates are available.


Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
OpenSSLopenssl 0.9.8 Base | 0.9.8a Base | 0.9.8b Base | 0.9.8c Base | 0.9.8d Base | 0.9.8e Base | 0.9.8f Base | 0.9.8g Base | 0.9.8h Base | 0.9.8i Base | 0.9.8j Base | 0.9.8k Base | 0.9.8l Base | 0.9.8m Base | 0.9.8n Base | 0.9.8o Base | 0.9.8p Base | 0.9.8q Base | 0.9.8r Base | 0.9.8s Base | 0.9.8t Base | 0.9.8u Base | 0.9.8v Base | 0.9.8w Base | 0.9.8x Base | 1.0.0 Base | 1.0.0a Base | 1.0.0b Base | 1.0.0c Base | 1.0.0d Base | 1.0.0e Base | 1.0.0f Base | 1.0.0g Base | 1.0.0h Base | 1.0.0i Base | 1.0.0j Base | 1.0.0k Base | 1.0.1 Base | 1.0.1a Base | 1.0.1b Base | 1.0.1c Base | 1.0.1d Base | 1.0.1e Base | 1.0.1f Base | 1.0.1g Base

Associated Products:
BlackBerryBlackberry Enterprise Service 10.1 Base, .1, .2 | 10.2 Base
BlackBerryBlackBerry OS 10 Base
Blue Coat Systems, Inc.IntelligenceCenter 3.2 Base, .1
FreeBSD ProjectFreeBSD 6.3 Base | 6.4 Base | 7.0 Base | 7.1 Base | 7.2 Base | 7.3 Base | 7.4 Base | 8.0 Base | 8.1 Base | 8.2 Base | 8.3 Base | 8.4 Base | 9.0 Base | 9.1 Base | 9.2 Base | 9.3 Base | 10.0 Base
HPHP SSL for OpenVMS 1.4 Base, -467, -471
HPHP-UX 11.11/11i Base | 11.23 Base | 11.31 Base
HPOperations Analytics 2.0 Base | 2.1 Base
Oracle CorporationSolaris 11.1 Base
Red Hat, Inc.Red Hat Enterprise Linux 7 Base
Red Hat, Inc.Red Hat Enterprise Linux Server AUS 6.5 x86_64
Red Hat, Inc.Red Hat Enterprise Linux Desktop 6 IA-32, x86_64
Red Hat, Inc.Red Hat Enterprise Linux HPC Node 6 x86_64
Red Hat, Inc.Red Hat Enterprise Linux Server 6 IA-32, PPC, PPC 64, s390, s390x, x86_64
Red Hat, Inc.Red Hat Enterprise Linux Server EUS 6.5.z IA-32, PPC, PPC64, s390, s390x, x86_64
Red Hat, Inc.Red Hat Enterprise Linux Workstation 6 IA-32, x86_64
Red Hat, Inc.Red Hat Storage Server 2.1 x86_64




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