Multiple Asterisk Products 'PJSIP Transaction Layer' Heap Based Buffer Overflow Vulnerability

Bugtraq ID:	98572
Class:	Boundary Condition Error
CVE:	CVE-2017-9372
Remote:	Yes
Local:	No
Published:	Apr 12 2017 12:00AM
Updated:	Jun 02 2017 05:01PM
Credit:	Sandro Gauci
Vulnerable:	Asterisk Certified Asterisk 13.13-cert3 Asterisk Certified Asterisk 13.13 Asterisk Asterisk Open Source 13.7.1 Asterisk Asterisk Open Source 13.3.2 Asterisk Asterisk Open Source 13.0.1 Asterisk Asterisk Open Source 14.0 Asterisk Asterisk Open Source 13.8.1 Asterisk Asterisk Open Source 13.1.1 Asterisk Asterisk Open Source 13.0.2 Asterisk Asterisk Open Source 13.0
Not Vulnerable:	Asterisk Certified Asterisk 13.13-cert4 Asterisk Asterisk Open Source 14.4.1 Asterisk Asterisk Open Source 13.15.1

Multiple Asterisk Products 'PJSIP Transaction Layer' Heap Based Buffer Overflow Vulnerability

Multiple Asterisk products are prone to a heap-based buffer-overflow vulnerability because the application fails to perform adequate boundary-checks on user-supplied data.

An attacker can exploit this issue to crash the affected application, denying service to legitimate users. Due to the nature of this issue, arbitrary code execution may be possible but this has not been confirmed.

Multiple Asterisk Products 'PJSIP Transaction Layer' Heap Based Buffer Overflow Vulnerability

Currently we are not aware of any working exploits. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].

Multiple Asterisk Products 'PJSIP Transaction Layer' Heap Based Buffer Overflow Vulnerability

Solution:
Updates are available. Please see the references or vendor advisory for more information.

Multiple Asterisk Products 'PJSIP Transaction Layer' Heap Based Buffer Overflow Vulnerability

References:

• Asterisk Homepage (Asterisk)
  
• Asterisk Project Security Advisory - AST-2017-002 (Asterisk)
  
• Heap overflow in CSEQ header parsing affects Asterisk chan_pjsip and PJSIP (Asterisk)