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Sid 1-21767

Message

PROTOCOL-VOIP Digium Asterisk IAX2 Channel Driver DoS attempt

Summary

The IAX2 channel driver (chan_iax2) in Asterisk before 1.2.22 and 1.4.x before 1.4.8, Business Edition before B.2.2.1, AsteriskNOW before beta7, Appliance Developer Kit before 0.5.0, and s800i before 1.0.2 allows remote attackers to cause a denial of service (crash) via a crafted (1) LAGRQ or (2) LAGRP frame that contains information elements of IAX frames, which results in a NULL pointer dereference when Asterisk does not properly set an associated variable.

Impact

CVSS base score 5.0 CVSS impact score 2.9 CVSS exploitability score 10.0 confidentialityImpact NONE integrityImpact NONE availabilityImpact NONE

CVE-2007-3763:

CVSS base score 5.0

CVSS impact score 2.9

CVSS exploitability score 10.0

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Detailed information

CVE-2007-3763: The IAX2 channel driver (chan_iax2) in Asterisk before 1.2.22 and 1.4.x before 1.4.8, Business Edition before B.2.2.1, AsteriskNOW before beta7, Appliance Developer Kit before 0.5.0, and s800i before 1.0.2 allows remote attackers to cause a denial of service (crash) via a crafted (1) LAGRQ or (2) LAGRP frame that contains information elements of IAX frames, which results in a NULL pointer dereference when Asterisk does not properly set an associated variable.

Affected systems

  • asterisk asterisk 1.0
  • asterisk asterisk 1.0.6
  • asterisk asterisk 1.0.7
  • asterisk asterisk 1.0.8
  • asterisk asterisk 1.0.9
  • asterisk asterisk 1.0.10
  • asterisk asterisk 1.0.11
  • asterisk asterisk 1.0.12
  • asterisk asterisk 1.2.0_beta1
  • asterisk asterisk 1.2.0_beta2
  • asterisk asterisk 1.2.5
  • asterisk asterisk 1.2.6
  • asterisk asterisk 1.2.7
  • asterisk asterisk 1.2.8
  • asterisk asterisk 1.2.9
  • asterisk asterisk 1.2.10
  • asterisk asterisk 1.2.11
  • asterisk asterisk 1.2.12
  • asterisk asterisk 1.2.13
  • asterisk asterisk 1.2.14
  • asterisk asterisk 1.2.15
  • asterisk asterisk 1.2.16
  • asterisk asterisk 1.2.17
  • asterisk asterisk 1.4.1
  • asterisk asterisk 1.4.2
  • asterisk asterisk 1.4.4_2007-04-27
  • asterisk asterisk 1.4_beta
  • asterisk asterisk a
  • asterisk asterisk b.1.3.2
  • asterisk asterisk b.1.3.3
  • asterisk asterisk b.2.2.0
  • asterisk asteriskappliancedeveloper_kit 0.4
  • asterisk asterisknow beta_5
  • asterisk asterisknow beta_6
  • asterisk s800i_appliance 1.0
  • asterisk s800i_appliance 1.0.1

Ease of attack

CVE-2007-3763:

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

False positives

None known

False negatives

None known

Corrective action

Upgrade to the latest non-affected version of the software.

Apply the appropriate vendor supplied patches.

Contributors

  • Talos research team.
  • This document was generated from data supplied by the national vulnerability database, a product of the national institute of standards and technology.
  • For more information see nvd.

Additional References