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Asterisk PBX SDP Header Overflow Vulnerability

Information

Severity

Severity

High

Family

Family

Denial of Service

CVSSv2 Base

CVSSv2 Base

7.8

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

14 years ago

Modified

Modified

3 years ago

Summary

The remote Asterisk PBX SIP server is affected by an overflow vulnerability.

Insight

Insight

The application installed suffers from a remote overflow in the SIP service resulting in a denial of service. An attacker can send a malformed INVITE packet with two SDP headers, whitin the first header a existing IP address in the 'c=' variable and in the second SDP header a NOT existing IP address in 'c='.

Solution

Solution

Upgrade to Asterisk release 1.4.2/1.2.17 or newer.

Common Vulnerabilities and Exposures (CVE)