|Check Point Reference:||CPAI-2015-0802|
|Date Published:||7 Jul 2015|
|Last Updated:||15 Nov 2017|
|Source:||Microsoft Security Bulletin MS15-055|
|Protection Provided by:||
|Who is Vulnerable?|| Microsoft Windows 7 |
Microsoft Windows 8
Microsoft Windows 8.1
Microsoft Windows RT
Microsoft Windows RT 8.1
Microsoft Windows Server 2008
Microsoft Windows Server 2008 R2
Microsoft Windows Server 2012
Microsoft Windows Server 2012 R2
OpenSSL Project OpenSSL prior to 1.0.1n
OpenSSL Project OpenSSL prior to 1.0.2b
|Vulnerability Description||An information disclosure vulnerability exists in multiple implementations of TLS 1.2 and earlier, when Ephemeral Diffie-Hellman cipher suites including their EXPORT versions are used. It is possible to downgrade a DHE cipher to a DHE_EXPORT cipher, which can be broken, and thereby perform a man-in-the-middle attack. This vulnerability is popularly called the 'Logjam' TLS attack. Successful exploitation would allow the attacker to decrypt the traffic and obtain or modify sensitive information.|
|Update/Patch Avaliable||Apply patches from: MS15-055|
This protection will detect and block attempts to exploit this vulnerability.
In order for the protection to be activated, update your Security Gateway product to the latest IPS update.For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.
This protection's log will contain the following information:
Attack Name: SSL Enforcement Violation.
Attack Information: TLS DHE_EXPORT Information Disclosure (MS15-055)