Asterisk IAX2 Packet Amplification Remote Denial of Service Vulnerability

Publish date: February 15, 2011
  Severity: MEDIUM
  CVE Identifier: CVE-2008-1897
  Advisory Date: FEB 15, 2011

  DESCRIPTION

The IAX2 channel driver (chan_iax2) in Asterisk Open Source 1.0.x, 1.2.x before 1.2.28, and 1.4.x before 1.4.19.1; Business Edition A.x.x, B.x.x before B.2.5.2, and C.x.x before C.1.8.1; AsteriskNOW before 1.0.3; Appliance Developer Kit 0.x.x; and s800i before 1.1.0.3, when configured to allow unauthenticated calls, does not verify that an ACK response contains a call number matching the server's reply to a NEW message, which allows remote attackers to cause a denial of service (traffic amplification) via a spoofed ACK response that does not complete a 3-way handshake. NOTE: this issue exists because of an incomplete fix for CVE-2008-1923.

  TREND MICRO PROTECTION INFORMATION

Trend Micro Deep Security shields networks through Deep Packet Inspection (DPI) rules. Trend Micro customers using OfficeScan with Intrusion Defense Firewall (IDF) plugin are also protected from attacks using these vulnerabilities. Please refer to the filter number and filter name when applying appropriate DPI and/or IDF rules.

  SOLUTION

  Trend Micro Deep Security DPI Rule Number: 1002607
  Trend Micro Deep Security DPI Rule Name: 1002607 - Asterisk IAX2 Packet Amplification Remote Denial of Service

  AFFECTED SOFTWARE AND VERSION

  • asterisk asterisk_appliance_developer_kit 0.2
  • asterisk asterisk_appliance_developer_kit 0.3
  • asterisk asterisk_appliance_developer_kit 0.4
  • asterisk asterisk_appliance_developer_kit 0.5
  • asterisk asterisk_appliance_developer_kit 0.6
  • asterisk asterisk_appliance_developer_kit 0.6.0
  • asterisk asterisk_appliance_developer_kit 0.7
  • asterisk asterisk_appliance_developer_kit 0.8
  • asterisk asterisk_business_edition a
  • asterisk asterisknow 1.0
  • asterisk asterisk_business_edition c1.8.0
  • asterisk asterisk_business_edition c.1.6.2
  • asterisk asterisk_business_edition c.1.6.1
  • asterisk asterisk_business_edition c.1.6
  • asterisk asterisk_business_edition c.1.0
  • asterisk asterisk_business_edition b.2.5.1
  • asterisk asterisk_business_edition b.2.3.6
  • asterisk asterisknow 1.0.1
  • asterisk asterisknow 1.0.2
  • asterisk open_source 1.4.19
  • asterisk open_source 1.4.18.1
  • asterisk open_source 1.4.18
  • asterisk open_source 1.4.17
  • asterisk open_source 1.4.16.2
  • asterisk open_source 1.4.16.1
  • asterisk open_source 1.4.16
  • asterisk open_source 1.4.15
  • asterisk open_source 1.4.14
  • asterisk open_source 1.4.13
  • asterisk open_source 1.4.12.1
  • asterisk open_source 1.4.12
  • asterisk open_source 1.4.11
  • asterisk open_source 1.4.10.1
  • asterisk open_source 1.4.10
  • asterisk open_source 1.4.1
  • asterisk open_source 1.4.0
  • asterisk open_source 1.2.9.1
  • asterisk open_source 1.2.9
  • asterisk open_source 1.2.8
  • asterisk open_source 1.2.7.1
  • asterisk open_source 1.2.7
  • asterisk open_source 1.2.6
  • asterisk open_source 1.2.5
  • asterisk open_source 1.2.4
  • asterisk open_source 1.2.3
  • asterisk s800i 1.0
  • asterisk s800i 1.0.1
  • asterisk s800i 1.0.2
  • asterisk s800i 1.0.3
  • asterisk s800i 1.0.3.3
  • asterisk s800i 1.1.0
  • asterisk s800i 1.1.0.1
  • asterisk s800i 1.1.0.2

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