HTTP: Cisco VoIP Phone PortInformation DOS

This signature detects attempts to exploit a known vulnerability in Cisco VoIP phones. Versions CP-7910 and later are vulnerable. Attackers can send an arbitrarily long (120000+) StreamID to the PortInformation script to cause an error message that displays a memory dump. Attackers can use this information to reconstruct the calling patterns of a particular phone.

Extended Description

The 7900 series VoIP Phones are a Voice-Over-IP solution distributed by Cisco Systems. It is possible to deny service to users of this line of phones. By placing a request to the /StreamingStatistics script with a stream ID (i.e. http://www.example.com/StreamingStatistics? where is an integer value) of arbitrarily high value, the phone will reset itself, creating the inability to place or receive calls for a period of up to thirty seconds. This has been reportedly reproduced by passing stream ID values of greater than 32768, and consistently reproduced with a value of 120000.

Affected Products

Cisco voip_phone_cp-7960

References

BugTraq: 4794

CVE: CVE-2002-0882

URL: http://online.securityfocus.com/advisories/4140 http://online.securityfocus.com/archive/1/273673

Short Name

HTTP:CISCO:VOIP:PORT-INFO-DOS

Severity

Minor

Recommended

False

Recommended Action

None

HTTP: Cisco VoIP Phone PortInformation DOS

Extended Description

Affected Products

References

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