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Category:   Device (Embedded Server/Appliance)  >   Rugged Operating System (ROS) Vendors:   RuggedCom, Siemens
Rugged Operating System (ROS) SSL 3.0 Protocol Downgrade Flaw Lets Remote Users Decrypt SSL Traffic
SecurityTracker Alert ID:  1033022
SecurityTracker URL:  http://securitytracker.com/id/1033022
CVE Reference:   CVE-2015-5537   (Links to External Site)
Date:  Jul 22 2015
Impact:   Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): ROS prior to 4.2.0; ROX II all versions
Description:   A vulnerability was reported in Rugged Operating System (ROS). A remote user can decrypt SSL sessions in certain cases.

A remote user can with the ability to conduct a man-in-the-middle attack can force a client to negotiate a downgrade to SSLv3 instead of a TLS v1.x protocol and then conduct a BEAST-style of attack to decrypt portions of the session.

This protocol vulnerability is referred to as the POODLE ("Padding Oracle On Downgraded Legacy Encryption") vulnerability.

This is a flaw in the protocol rather than in the SSL implementation.

ROX-based devices are also affected.

The original advisory is available at:

https://www.openssl.org/~bodo/ssl-poodle.pdf

Bodo Moller, Thai Duong, and Krzysztof Kotowicz reported this vulnerability.

Impact:   A remote user with the ability to conduct a man-in-the-middle attack can decrypt SSL sessions.
Solution:   The vendor has issued a fix (ROS 4.2.0).

No solution was available at the time of this entry for ROX II.

The vendor's advisory is available at:

http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-396873.pdf

Vendor URL:  www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-396873.pdf (Links to External Site)
Cause:   Access control error

Message History:   None.


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