Signature Detail

VOIP: Digium Asterisk Multiple Products IAX2 Handshake Denial of Service

This signature detects attempts to exploit a known vulnerability against multiple Digium Asterisk products. A successful attack can result in a denial-of-service condition.

Extended Description

Asterisk is prone to a remote denial-of-service vulnerability caused by a flaw in the IAX2 protocol. Successful exploits result in packet-amplification attacks. Malicious users can cause Asterisk to send large numbers of UDP datagrams to arbitrary addresses, potentially denying service to both the Asterisk service and networks that may become flooded.

Affected Products

• Asterisk 0.1.11
• Asterisk 0.1.7
• Asterisk 0.1.8
• Asterisk 0.1.9
• Asterisk 0.1.9 -1
• Asterisk 0.2.0
• Asterisk 0.3.0
• Asterisk 0.4.0
• Asterisk 0.4.1
• Asterisk 0.7.0 .0
• Asterisk 0.7.1
• Asterisk 0.7.2
• Asterisk 0.9.0 .0
• Asterisk 1.0.0
• Asterisk 1.0.10
• Asterisk 1.0.11
• Asterisk 1.0.12
• Asterisk 1.0.3.4
• Asterisk 1.0.6
• Asterisk 1.0.7
• Asterisk 1.0.8
• Asterisk 1.0.9
• Asterisk 1.2.0 .0-beta1
• Asterisk 1.2.0 .0-beta2
• Asterisk 1.2.10
• Asterisk 1.2.11
• Asterisk 1.2.13
• Asterisk 1.2.14
• Asterisk 1.2.15
• Asterisk 1.2.16
• Asterisk 1.2.17
• Asterisk 1.2.18
• Asterisk 1.2.19
• Asterisk 1.2.21
• Asterisk 1.2.22
• Asterisk 1.2.23
• Asterisk 1.2.24
• Asterisk 1.2.25
• Asterisk 1.2.26
• Asterisk 1.2.27
• Asterisk 1.2.5
• Asterisk 1.2.6
• Asterisk 1.2.7
• Asterisk 1.2.8
• Asterisk 1.2.9
• Asterisk 1.4.1
• Asterisk 1.4.10
• Asterisk 1.4.11
• Asterisk 1.4.12
• Asterisk 1.4.13
• Asterisk 1.4.14
• Asterisk 1.4.15
• Asterisk 1.4.16
• Asterisk 1.4.17
• Asterisk 1.4.18
• Asterisk 1.4.18.1
• Asterisk 1.4.19
• Asterisk 1.4.19-Rc3
• Asterisk 1.4.2
• Asterisk 1.4.3
• Asterisk 1.4.4
• Asterisk 1.4.5
• Asterisk 1.4.6
• Asterisk 1.4.7
• Asterisk 1.4.8
• Asterisk 1.4.9
• Asterisk 1.4 Beta
• Asterisk 1.4 Revision 95946
• Asterisk Asterisk Appliance Developer Kit 0.2.0
• Asterisk Asterisk Appliance Developer Kit 0.3.0
• Asterisk Asterisk Appliance Developer Kit 0.4.0
• Asterisk Asterisk Appliance Developer Kit 0.5.0
• Asterisk Asterisk Appliance Developer Kit 0.6.0
• Asterisk Asterisk Appliance Developer Kit 0.7.0
• Asterisk Asterisk Appliance Developer Kit 0.8.0
• Asterisk Asterisk Appliance Developers Kit
• Asterisk Asterisk Business Edition A
• Asterisk Asterisk Business Edition B
• Asterisk Asterisk Business Edition B.1.3.2
• Asterisk Asterisk Business Edition B.1.3.3
• Asterisk Asterisk Business Edition B.2.2.0
• Asterisk Asterisk Business Edition B.2.2.1
• Asterisk Asterisk Business Edition B.2.3.1
• Asterisk Asterisk Business Edition B.2.3.2
• Asterisk Asterisk Business Edition B.2.3.3
• Asterisk Asterisk Business Edition B.2.3.4
• Asterisk Asterisk Business Edition B.2.3.6
• Asterisk Asterisk Business Edition B.2.5.1
• Asterisk Asterisk Business Edition C
• Asterisk Asterisk Business Edition C.1.0-beta7
• Asterisk Asterisk Business Edition C.1.0-beta8
• Asterisk Asterisk Business Edition C.1.6
• Asterisk Asterisk Business Edition C.1.6.1
• Asterisk Asterisk Business Edition C.1.6.2
• Asterisk AsteriskNow 1.0
• Asterisk AsteriskNow 1.0.2
• Asterisk AsteriskNow Beta 5
• Asterisk AsteriskNow Beta 6
• Asterisk AsteriskNow Beta 7
• Asterisk s800i Appliance 1.0.0
• Asterisk s800i Appliance 1.0.1
• Asterisk s800i Appliance 1.0.2
• Asterisk s800i Appliance 1.0.3
• Asterisk s800i Appliance 1.1.0.0
• Asterisk s800i Appliance 1.1.0.2
• Debian Linux 4.0
• Debian Linux 4.0 Alpha
• Debian Linux 4.0 Amd64
• Debian Linux 4.0 Arm
• Debian Linux 4.0 Hppa
• Debian Linux 4.0 Ia-32
• Debian Linux 4.0 Ia-64
• Debian Linux 4.0 M68k
• Debian Linux 4.0 Mips
• Debian Linux 4.0 Mipsel
• Debian Linux 4.0 Powerpc
• Debian Linux 4.0 S/390
• Debian Linux 4.0 Sparc
• Gentoo Linux
• Red Hat Fedora 7
• Red Hat Fedora 8

References

• BugTraq: 28901
• CVE: CVE-2008-1897