CVE-2017-12311

A vulnerability in the H.264 decoder function of Cisco Meeting Server could allow an unauthenticated, remote attacker to cause a Cisco Meeting Server media process to restart unexpectedly when it receives an illegal H.264 frame. The vulnerability is triggered by an H.264 frame that has an invalid picture parameter set (PPS) value. An attacker could exploit this vulnerability by sending a malformed H.264 frame to the targeted device. An exploit could allow the attacker to cause a denial of service (DoS) condition because the media process could restart. The media session should be re-established within a few seconds, during which there could be a brief interruption in service. Cisco Bug IDs: CSCvg12559.

• CWE-399
• CWE-20

• http://www.securityfocus.com/bid/101855Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1039827Third Party Advisory, VDB Entry
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-cmsVendor Advisory
• http://www.securityfocus.com/bid/101855Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1039827Third Party Advisory, VDB Entry
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-cmsVendor Advisory

Published

Nov 16, 2017

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2017-12306A vulnerability in the upgrade process of Cisco Spark Board …
• CVE-2017-12307A vulnerability in the web framework of Cisco Small Business…6.1
• CVE-2017-12308A vulnerability in the web framework of Cisco Small Business…6.1
• CVE-2017-12309A vulnerability in the Cisco Email Security Appliance (ESA) …
• CVE-2017-1231IBM BigFix Platform 9.5 - 9.5.9 stores user credentials in p…4.4
• CVE-2017-12310A vulnerability in the auto discovery phase of Cisco Spark H…
• CVE-2017-12312An untrusted search path (aka DLL Preloading) vulnerability …
• CVE-2017-12313An untrusted search path (aka DLL Preload) vulnerability in …
• CVE-2017-12314A vulnerability in the Cisco FindIT Network Discovery Utilit…
• CVE-2017-12315A vulnerability in system logging when replication is being …
• CVE-2017-12316A vulnerability in the Guest Portal login page of Cisco Iden…
• CVE-2017-12317The Cisco AMP For Endpoints application allows an authentica…