FreeBSD : PJSIP -- TCP denial of service in PJProject (e21474c6-031a-11e6-aa86-001999f8d30b)

High Nessus Plugin ID 90555


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


The Asterisk project reports :

PJProject has a limit on the number of TCP connections that it can accept. Furthermore, PJProject does not close TCP connections it accepts. By default, this value is approximately 60.

An attacker can deplete the number of allowed TCP connections by opening TCP connections and sending no data to Asterisk.

If PJProject has been compiled in debug mode, then once the number of allowed TCP connections has been depleted, the next attempted TCP connection to Asterisk will crash due to an assertion in PJProject.

If PJProject has not been compiled in debug mode, then any further TCP connection attempts will be rejected. This makes Asterisk unable to process TCP SIP traffic.

Note that this only affects TCP/TLS, since UDP is connectionless.


Update the affected packages.

See Also

Plugin Details

Severity: High

ID: 90555

File Name: freebsd_pkg_e21474c6031a11e6aa86001999f8d30b.nasl

Version: $Revision: 2.1 $

Type: local

Published: 2016/04/18

Modified: 2016/04/18

Dependencies: 12634

Risk Information

Risk Factor: High

Vulnerability Information

CPE: 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: 2016/04/15

Vulnerability Publication Date: 2016/02/15