Apple has released a security advisory and updated software to address the OpenSSL DTLS implementation regression error remote denial of service vulnerability.
Description
OpenSSL contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the targeted system.
The vulnerability is due to a regression error that was introduced through an update for a vulnerability in the Datagram Transport Layer Security (DTLS) protocol implementation of the affected software. An unauthenticated, remote attacker could exploit the vulnerability through an unspecified vector. Successful exploitation could allow the attacker to cause an unexpected termination of the application that uses the affected OpenSSL versions.
OpenSSL has confirmed the vulnerability and released software updates.
Warning Indicators
OpenSSL versions 1.0.0f and 0.9.8s are affected.
IntelliShield Analysis
The vulnerability is due to a regression error that was introduced through a fix for the vulnerability CVE-2011-4108.
The vulnerability is documented in IntelliShield Alert 24893.
Vendor Announcements
OpenSSL has released a security advisory at the following link: secadv_20120118
FreeBSD has released a VuXML document at the following link: OpenSSL -- DTLS Denial of Service
Apple has released a security advisory at the following link: HT5784
IBM has released a security advisory at the following link: CVE-2012-0050
Oracle has released a security advisory at the following link: CVE-2012-0050
VMware has released a security advisory at the following link: VMSA-2012-0013
Impact
An unauthenticated, remote attacker could exploit the vulnerability to cause an unexpected termination of the affected application, resulting in a DoS condition.
Technical Information
Technical details are not available.
Safeguards
Administrators are advised to apply the appropriate updates.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to monitor affected systems.
Patches/Software
OpenSSL has released updated versions at the following links:
Version 8, December 21, 2012, 7:48 PM: VMware has re-released a security advisory and updated software to address the OpenSSL DTLS implementation regression error remote denial of service vulnerability.
Version 7, September 5, 2012, 2:07 PM: VMware has released a security advisory and updated software to address the OpenSSL DTLS implementation regression error remote denial of service vulnerability.
Version 6, June 25, 2012, 10:36 AM: HP has released a security bulletin and updated software to address the OpenSSL DTLS implementation regression error remote denial of service vulnerability.
Version 5, April 5, 2012, 8:33 AM: Oracle has released a security advisory and patches to address the OpenSSL DTLS implementation regression error remote denial of service vulnerability.
Version 4, March 23, 2012, 3:50 PM: IBM has released a security advisory and fixes to address the OpenSSL DTLS implementation regression error remote denial of service vulnerability.
Version 3, January 26, 2012, 9:30 AM: HP has released a security bulletin and updated software to address the OpenSSL DTLS implementation regression error remote denial of service vulnerability.
Version 2, January 23, 2012, 5:18 PM: FreeBSD has released a VuXML document and updated ports collection to address the OpenSSL DTLS implementation regression error remote denial of service vulnerability.
Version 1, January 19, 2012, 11:51 AM: OpenSSL contains a vulnerability that could allow an unauthenticated, remote attacker to cause a DoS condition. Updates are available.
3.5 Base, Update 1, Update 2, Update 3, Update 4 | 4.0 Base | 4.1 Base | 5.0 Base
VMware, Inc.
VMware ESX Server
3.5 Base, Update 1, Update 2, Update 3, Update 4 | 4.0 Base | 4.1 Base
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