Asterisk SIP Channel T.38 SDP Parsing Multiple Buffer Overflows

high Nessus Plugin ID 25671

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Synopsis

A telephony application running on the remote host is affected by multiple buffer overflow vulnerabilities.

Description

The version of Asterisk running on the remote host contains two stack-based buffer overflows in its SIP SDP handler when attempting to read the 'T38FaxRateManagement:' and 'T38FaxUdpEC:' options in the SDP within a SIP packet. An unauthenticated, remote attacker may be able to leverage this flaw to execute code on the affected host subject to the privileges under which Asterisk runs.

Solution

Either disable T.38 support or upgrade to Asterisk 1.4.3 / AsteriskNow Beta 6 or later.

Plugin Details

Severity: High

ID: 25671

File Name: asterisk_sip_t38_sdp_overflow.nasl

Version: 1.27

Type: remote

Family: Gain a shell remotely

Published: 7/6/2007

Updated: 4/11/2022

Configuration: Enable paranoid mode, Enable thorough checks

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 6.3

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

Vulnerability Information

CPE: cpe:/a:digium:asterisk

Required KB Items: asterisk/sip_detected, Settings/ParanoidReport

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/24/2007

Vulnerability Publication Date: 4/25/2007

Exploitable With

Core Impact

Reference Information

CVE: CVE-2007-2293

BID: 23648

Detections

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