FreeBSD : asterisk -- Buffer Overrun in PJSIP transaction layer (0537afa3-3ce0-11e7-bf9d-001999f8d30b)

High Nessus Plugin ID 100313


The remote FreeBSD host is missing one or more security-related updates.


The Asterisk project reports :

A remote crash can be triggered by sending a SIP packet to Asterisk with a specially crafted CSeq header and a Via header with no branch parameter. The issue is that the PJSIP RFC 2543 transaction key generation algorithm does not allocate a large enough buffer. By overrunning the buffer, the memory allocation table becomes corrupted, leading to an eventual crash.

The multi-part body parser in PJSIP contains a logical error that can make certain multi-part body parts attempt to read memory from outside the allowed boundaries. A specially crafted packet can trigger these invalid reads and potentially induce a crash.

This issues is in PJSIP, and so the issue can be fixed without performing an upgrade of Asterisk at all. However, we are releasing a new version of Asterisk with the bundled PJProject updated to include the fix.

If you are running Asterisk with chan_sip, this issue does not affect you.


Update the affected packages.

See Also

Plugin Details

Severity: High

ID: 100313

File Name: freebsd_pkg_0537afa33ce011e7bf9d001999f8d30b.nasl

Version: $Revision: 3.1 $

Type: local

Published: 2017/05/22

Modified: 2017/05/22

Dependencies: 12634

Risk Information

Risk Factor: High

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:asterisk13, p-cpe:/a:freebsd:freebsd:pjsip, p-cpe:/a:freebsd:freebsd:pjsip-extsrtp, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 2017/05/19

Vulnerability Publication Date: 2017/04/12