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Category:   Application (Security)  >   IBM Security Access Manager Vendors:   IBM
(IBM Issues Fix for IBM Security Access Manager) OpenSSL SSL3_AL_WARNING Alert Processing Flaw Lets Remote Users Consume Excessive CPU Resources on the Target System
SecurityTracker Alert ID:  1039202
SecurityTracker URL:  http://securitytracker.com/id/1039202
CVE Reference:   CVE-2016-8610   (Links to External Site)
Date:  Aug 17 2017
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 7.0.0, 8.0.0, 8.0.0.1, 8.0.0.2, 8.0.0.3, 8.0.0.4, 8.0.0.5, 8.0.1, 8.0.1.2, 8.0.1.3, 8.0.1.4, 8.0.1.5, 9.0.0, 9.0.0.1, 9.0.1.0, 9.0.2.0, 9.0.2.1, 9.0.3
Description:   A vulnerability was reported in OpenSSL. A remote user can consume excessive CPU resources on the target system. IBM Security Access Manager is affected.

The ssl3_read_bytes() function in 'ssl/s3_pkt.c' does not properly handle certain packets. A remote user can send a flood of SSL3_AL_WARNING alerts during the SSL handshake to consume excessive CPU resources on the target system. As a result, services that use the OpenSSL library may become unavailable for the duration of the packet flood.

Shi Lei from Gear Team, Qihoo 360 Inc., reported this vulnerability.

Impact:   A remote user can consume excessive CPU resources on the target system.
Solution:   IBM has issued a fix for IBM Security Access Manager (APARs IV98170, IV98217, IV98219).

The IBM advisory is available at:

http://www-01.ibm.com/support/docview.wss?uid=swg22007023

Vendor URL:  www-01.ibm.com/support/docview.wss?uid=swg22007023 (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Red Hat Enterprise), Linux (SuSE), UNIX (AIX), UNIX (Solaris - SunOS), Windows (2000), Windows (2003)

Message History:   This archive entry is a follow-up to the message listed below.
Oct 24 2016 OpenSSL SSL3_AL_WARNING Alert Processing Flaw Lets Remote Users Consume Excessive CPU Resources on the Target System



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