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Category:   Device (Firewall)  >   Cisco ASA Vendors:   Cisco
Cisco ASA Input Validation Flaw in libSRTP Lets Remote Users Cause the Target System to Restart
SecurityTracker Alert ID:  1035637
SecurityTracker URL:
CVE Reference:   CVE-2015-6360   (Links to External Site)
Date:  Apr 20 2016
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 5500-X series; prior to versions, 9.1.7,,
Description:   A vulnerability was reported in Cisco ASA. A remote user can cause the target system to restart.

A remote user can send a specially crafted Secure Real-Time Transport Protocol (SRTP) packet to trigger an integer underflow in the encryption processing subsystem of the SRTP library (libSRTP) and cause the target system to restart.

Systems configured with the deprecated Phone Proxy feature are affected.

The vendor has assigned bug ID CSCux00686 to this vulnerability.

Other Cisco products are affected.

Randell Jesup with the Mozilla team reported this vulnerability.

Impact:   A remote user can cause the target system to restart.
Solution:   The vendor has issued a fix (, 9.1.7,,

The vendor's advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Input validation error

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

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