Asterisk main/udptl.c Buffer Overflows (AST-2011-002)

High Nessus Network Monitor Plugin ID 5802


The remote VoIP server is affected by multiple buffer overflow vulnerabilities.


The version of Asterisk running on the remote host may be vulnerable to heap- and stack-buffer overflow attacks with specially crafted UDPTL packets.

Successful exploitation requires T.38 support to be enabled on the target, which is not the default, and can allow execution of arbitrary code in the context of the Asterisk server or an application crash.


Upgrade to Asterisk,,,, or later or Asterisk Business Edition C.3.6.3 or later.\nAlternatively, disable T.38 support by setting 't38pt_udptl' to 'no' in sip.conf and ensuring that the chan_ooh323 module is not loaded.

See Also

Plugin Details

Severity: High

ID: 5802

File Name: 5802.prm

Family: Generic

Published: 2011/02/23

Modified: 2017/01/31

Dependencies: 3768

Nessus ID: 52157

Risk Information

Risk Factor: High


Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: CVSS2#E:U/RL:OF/RC:C


Base Score: 7.3

Temporal Score: 6.4


Temporal Vector: CVSS3#E:U/RL:O/RC:C

Vulnerability Information

Patch Publication Date: 2011/02/21

Vulnerability Publication Date: 2011/01/27

Reference Information

CVE: CVE-2011-1147

BID: 46474

OSVDB: 70968