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Severity
Critical
Title
Unified Communications Manager CTIManager DoS
Description
The Cisco Unified Communications Manager (UCM) and Call Manager (CM) provide the CTIManager service as part of the Extended Functions Service Architecture. Due to a flaw in the application it is possible to cause a Denial of Service (DoS) by issuing a specially crafted packet to its listening port. Details
Category
Denial of Service
Vendor
Cisco
Product
Unified Communications Manager 5.x, Unified Communications Manager 6.x
Released
2008-06-25
updated
2008-06-25
Response
Patch available
Recommendations
Cisco has acknowledged the issue and is issuing patches to correct it.
In the short term it is recommended that a VoIP aware IPS product, such as VoIPguard, with signatures to detect attempts to exploit this issue, be implemented to prevent it from being exploited. Implementing best practices can limit the exposure of this issue. It is therefore recommended to restrict access to TCP port 2748 on vulnerable CCM and CUCM servers to network ranges with authorized CTI application clients.
Cisco customers with a valid support agreement may wish to speak with their support contact in order to obtain further vendor details. Tracking Id
VSRCS-2008-005
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Each line represents an individual vulnerability or group of vulnerabilities. For example, "UCM Multiple Hardcoded Passwords" is presented here in a single line but was reported to Nortel as sixteen (16) individual vulnerabilities.
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