Asterisk download protocol denial of service

asterisk-downloadprotocol-dos (43955) The risk level is classified as LowLow Risk

Description:

Asterisk is vulnerable to a denial of service, caused by the failure to require a handshake by the firmware download protocol. By sending a spoofed IAX2 FWDOWNL request that consumes a minimum of 40 bytes from a 1040 byte response, a remote attacker could exploit this vulnerability to flood the server with unwanted packets resulting in a denial of service.

*CVSS:

Base Score: 5
  Access Vector: Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Partial
 
Temporal Score: 3.7
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Refer to AST-2008-011 for patch, upgrade or suggested workaround information. See References.

References:

  • AST-2008-011: Traffic amplification in IAX2 firmware provisioning system.
  • Asterisk Web site: Asterisk :: The Open Source PBX & Telephony Platform .
  • BID-30321: Asterisk IAX 'POKE' Requests Remote Denial of Service Vulnerability
  • BID-30350: Asterisk IAX2 Firmware Provisioning Packet Amplification Remote Denial of Service Vulnerability
  • CVE-2008-3264: The FWDOWNL firmware-download implementation in Asterisk Open Source 1.0.x, 1.2.x before 1.2.30, and 1.4.x before 1.4.21.2; Business Edition A.x.x, B.x.x before B.2.5.4, and C.x.x before C.1.10.3; AsteriskNOW; Appliance Developer Kit 0.x.x; and s800i 1.0.x before 1.2.0.1 allows remote attackers to cause a denial of service (traffic amplification) via an IAX2 FWDOWNL request.
  • GLSA-200905-01: Asterisk: Multiple vulnerabilities
  • SA31178: Asterisk Two Denial of Service Vulnerabilities
  • SECTRACK ID: 1020536: Asterisk Firmware Update Protocol Lets Remote Users Attack Arbitrary Sites Via the Asterisk Server
  • VUPEN/ADV-2008-2168: Asterisk Products Multiple Remote Denial of Service Vulnerabilities

Platforms Affected:

  • Digium Asterisk Business Edition A
  • Digium Asterisk Business Edition B.1.3.2
  • Digium Asterisk Business Edition B.1.3.3
  • Digium Asterisk Business Edition B.2.2.0
  • Digium Asterisk Business Edition B.2.2.1
  • Digium Asterisk Business Edition B.2.3.1
  • Digium Asterisk Business Edition B.2.3.2
  • Digium Asterisk Business Edition B.2.3.3
  • Digium Asterisk Business Edition B.2.3.4
  • Digium Asterisk Business Edition B.2.5.0
  • Digium Asterisk Business Edition C.1.0 Beta7
  • Digium Asterisk Business Edition C.1.0 Beta8
  • Digium Asterisk Business Edition C.1.6.1
  • Digium Asterisk Open Source 1.0
  • Digium Asterisk Open Source 1.0.0
  • Digium Asterisk Open Source 1.0.1
  • Digium Asterisk Open Source 1.0.11
  • Digium Asterisk Open Source 1.0.11.1
  • Digium Asterisk Open Source 1.0.12
  • Digium Asterisk Open Source 1.0.2
  • Digium Asterisk Open Source 1.0.3
  • Digium Asterisk Open Source 1.0.4
  • Digium Asterisk Open Source 1.0.5
  • Digium Asterisk Open Source 1.0.6
  • Digium Asterisk Open Source 1.0.7
  • Digium Asterisk Open Source 1.0.8
  • Digium Asterisk Open Source 1.0.9
  • Digium Asterisk Open Source 1.2.0 Beta1
  • Digium Asterisk Open Source 1.2.0 Beta2
  • Digium Asterisk Open Source 1.2.0
  • Digium Asterisk Open Source 1.2.1
  • Digium Asterisk Open Source 1.2.10
  • Digium Asterisk Open Source 1.2.11
  • Digium Asterisk Open Source 1.2.12
  • Digium Asterisk Open Source 1.2.12.1
  • Digium Asterisk Open Source 1.2.13
  • Digium Asterisk Open Source 1.2.14
  • Digium Asterisk Open Source 1.2.15
  • Digium Asterisk Open Source 1.2.16
  • Digium Asterisk Open Source 1.2.17
  • Digium Asterisk Open Source 1.2.18
  • Digium Asterisk Open Source 1.2.19
  • Digium Asterisk Open Source 1.2.2
  • Digium Asterisk Open Source 1.2.20
  • Digium Asterisk Open Source 1.2.21
  • Digium Asterisk Open Source 1.2.21.1
  • Digium Asterisk Open Source 1.2.22
  • Digium Asterisk Open Source 1.2.23
  • Digium Asterisk Open Source 1.2.24
  • Digium Asterisk Open Source 1.2.25
  • Digium Asterisk Open Source 1.2.26
  • Digium Asterisk Open Source 1.2.26.1
  • Digium Asterisk Open Source 1.2.26.2
  • Digium Asterisk Open Source 1.2.27
  • Digium Asterisk Open Source 1.2.28
  • Digium Asterisk Open Source 1.2.29
  • Digium Asterisk Open Source 1.2.3
  • Digium Asterisk Open Source 1.2.4
  • Digium Asterisk Open Source 1.2.5
  • Digium Asterisk Open Source 1.2.6
  • Digium Asterisk Open Source 1.2.7
  • Digium Asterisk Open Source 1.2.7.1
  • Digium Asterisk Open Source 1.2.8
  • Digium Asterisk Open Source 1.2.9
  • Digium Asterisk Open Source 1.2.9.1
  • Digium Asterisk Open Source 1.4 Beta
  • Digium Asterisk Open Source 1.4.0
  • Digium Asterisk Open Source 1.4.1
  • Digium Asterisk Open Source 1.4.10
  • Digium Asterisk Open Source 1.4.10.1
  • Digium Asterisk Open Source 1.4.11
  • Digium Asterisk Open Source 1.4.12
  • Digium Asterisk Open Source 1.4.12.1
  • Digium Asterisk Open Source 1.4.13
  • Digium Asterisk Open Source 1.4.14
  • Digium Asterisk Open Source 1.4.15
  • Digium Asterisk Open Source 1.4.16
  • Digium Asterisk Open Source 1.4.16.1
  • Digium Asterisk Open Source 1.4.16.2
  • Digium Asterisk Open Source 1.4.17
  • Digium Asterisk Open Source 1.4.18
  • Digium Asterisk Open Source 1.4.18.1
  • Digium Asterisk Open Source 1.4.19
  • Digium Asterisk Open Source 1.4.2
  • Digium Asterisk Open Source 1.4.3
  • Digium Asterisk Open Source 1.4.4
  • Digium Asterisk Open Source 1.4.5
  • Digium Asterisk Open Source 1.4.6
  • Digium Asterisk Open Source 1.4.7
  • Digium Asterisk Open Source 1.4.7.1
  • Digium Asterisk Open Source 1.4.8
  • Digium Asterisk Open Source 1.4.9
  • Digium Asterisk Open Source 1.4_revision_95946
  • Digium AsteriskNOW pre-release
  • Gentoo Linux

Reported:

Jul 21, 2008

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