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                                 CERT-Renater

                   Note d'Information No. 2016/VULN179
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DATE                : 21/04/2016

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S): Cisco products running SRTP version prior to 1.5.3.

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http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160420-libsrtp
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  Multiple Cisco Products libSRTP Denial of Service Vulnerability

Advisory ID: cisco-sa-20160420-libsrtp

Revision 1.0

For Public Release 2016 April 20 16:00 UTC (GMT)

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Summary
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Cisco released version 1.5.3 of the Secure Real-Time Transport Protocol
(SRTP) library (libSRTP), which addresses a denial of service (DoS)
vulnerability. Multiple Cisco products incorporate a vulnerable version
of the libSRTP library.

The vulnerability is in the encryption processing subsystem of libSRTP
and could allow an unauthenticated, remote attacker to trigger a DoS
condition. The vulnerability is due to improper input validation of
certain fields of SRTP packets. An attacker could exploit this
vulnerability by sending a crafted SRTP packet designed to trigger the
issue to an affected device.

The impact of this vulnerability on Cisco products may vary depending
on the affected product. Details about the impact on each product are
outlined in the "Conditions" section of each Cisco bug for this
vulnerability. The bug IDs are listed at the top of this advisory and
in the table in "Vulnerable Products."

This advisory is available at the following link:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160420-libsrtp

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