CVE-2017-6763 — HIGH (7.5) — White Hats Nepal

Vulnerability Description

A vulnerability in the implementation of the H.264 protocol in Cisco Meeting Server (CMS) 2.1.4 could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected system. The vulnerability exists because the affected application does not properly validate Fragmentation Unit (FU-A) protocol packets. An attacker could exploit this vulnerability by sending a crafted H.264 FU-A packet through the affected application. A successful exploit could allow the attacker to cause a DoS condition on the affected system due to an unexpected restart of the CMS media process on the system. Although the CMS platform continues to operate and only the single, affected CMS media process is restarted, a brief interruption of media traffic for certain users could occur. Cisco Bug IDs: CSCve10131.

CVSS Score

7.5

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Cisco	Meeting Server	2.1.4

Related Weaknesses (CWE)

CWE-20

References

http://www.securityfocus.com/bid/100111Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039058Third Party AdvisoryVDB Entry
https://quickview.cloudapps.cisco.com/quickview/bug/CSCve10131Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
http://www.securityfocus.com/bid/100111Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039058Third Party AdvisoryVDB Entry
https://quickview.cloudapps.cisco.com/quickview/bug/CSCve10131Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory

FAQ

What is CVE-2017-6763?

CVE-2017-6763 is a vulnerability with a CVSS score of 7.5 (HIGH). A vulnerability in the implementation of the H.264 protocol in Cisco Meeting Server (CMS) 2.1.4 could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affec...

How severe is CVE-2017-6763?

CVE-2017-6763 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2017-6763?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Meeting Server.