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Cisco Bug: CSCum76937 - CUCM Distributed denial-of-service vulnerability on NTP server

Last Modified

Jan 15, 2020

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases

8.5(1) 8.6(2) 9.1(2)

Description (partial)

Symptom:
Cisco Unified Communications Manager (CallManager) includes a version of ntpd that is affected by the vulnerability identified by the following Common Vulnerability and Exposures (CVE) ID:

CVE-2013-5211

This bug was opened to address the potential impact on this product.

Conditions:
Device configured to use/broadcast NTP.

Related Community Discussions

<key>CSCum76937</key> - CUCM Distributed denial-of-service vulnerability on NTP server
I'd request that the built-in iptables on the CUCM, which we users can't adjust at all, could be autoadjusted by the CUCM itself to remove this DDOS vector, namely by restricting NTP to/from the CUCM only to these hosts:    the NTP server(s) it talks with, as configured in 'System&gt;Phone NTP Reference'    the device(s) subscribed to it, who get their time from it. why can that not be done?
Latest activity: Mar 10, 2014
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Bug Details Include

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