high
7.1
CWE
16
Advisory Published
Updated

CVE-2008-1923

First published: Wed Apr 23 2008(Updated: )

The IAX2 channel driver (chan_iax2) in Asterisk 1.2 before revision 72630 and 1.4 before revision 65679, when configured to allow unauthenticated calls, sends "early audio" to an unverified source IP address of a NEW message, which allows remote attackers to cause a denial of service (traffic amplification) via a spoofed NEW message.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Asterisk Business Edition=b.2.2.0
Asterisk=1.2.4-netsec
Asterisk=1.2.8
Asterisk=1.2.16-netsec
Asterisk Business Edition=c.1.6.1
Asterisk=1.0.1
Digium Asterisk s800i Appliance=1.0.3.3
Asterisk=1.2.14
Digium Asterisk s800i Appliance=1.0
Digium Asterisk s800i Appliance=1.0.2
Asterisk=1.4.19-rc2
Asterisk=1.2.20-netsec
Asterisk=1.2.12-netsec
Asterisk=1.2.19-netsec
Asterisk Business Edition<=c1.8.0
Asterisk=1.0.4
Asterisk=1.0
Asterisk=1.2.15
Asterisk=1.2.9.1-netsec
Asterisk=1.2.27
Asterisk=1.4.9
Asterisk=1.4.10
Asterisk=1.4.6
Asterisk=1.2.14-netsec
Asterisk=1.2.3
Asterisk=1.2.23
Asterisk=1.2.26.2-netsec
Asterisk=1.4.0
Asterisk=1.2.26.1
Asterisk=1.4.15
Asterisk=1.0.2
Asterisk=1.2.13-netsec
Asterisk=1.2.25-netsec
Asterisk=1.2.1
Asterisk Business Edition=c.1.0-beta8
Asterisk=1.2.26-netsec
Asterisk=1.0.11
Asterisk=1.4.19-rc3
Asterisk Business Edition=b.2.3.1
Asterisk=1.2.24
Asterisk=1.4.12.1
Digium Asterisk s800i Appliance=1.1.0
Asterisk=1.4.12
Asterisk=1.4.19-rc4
Asterisk=1.2.9.1
Asterisk=1.4.16.2
Digium Asterisk s800i Appliance=1.1.0.1
Asterisk=1.0.6
Asterisk=1.4.13
Asterisk=1.2.0
Asterisk=1.2.25
Asterisk=1.2.3-netsec
Asterisk=1.2.18-netsec
Asterisk=1.2.10-netsec
Asterisk=1.2.11
Asterisk=1.4.10.1
Asterisk=1.2.12
Asterisk=1.4.18.1
Asterisk=1.2.7.1-netsec
Asterisk=1.2.13
Asterisk Business Edition=b.2.5.0
Asterisk Business Edition=b.2.3.3
Asterisk=1.4.2
Asterisk=1.2.2
Asterisk=1.2.6-netsec
Asterisk=1.4.1
Asterisk=1.2.5
Asterisk=1.0.5
Asterisk=1.0.3
Asterisk=1.2.26
Asterisk=1.4.0-beta4
Asterisk=1.0.12
Asterisk=1.2.24-netsec
Digium Asterisk s800i Appliance=1.0.3
Asterisk=1.4.11
Asterisk=1.2.21
Asterisk=1.4.3
Asterisk=1.2.21-netsec
Asterisk Business Edition=c.1.0beta7
Asterisk=1.0.9
Asterisk=1.4.7
Asterisk Business Edition=b.1.3.2
Digium Asterisk s800i Appliance<=1.1.0.2
Asterisk=1.0.7
Asterisk=1.2.11-netsec
Asterisk=1.4.4
Digium AsteriskNOW<=1.0.2
Asterisk=1.4.7.1
Asterisk=1.2.26.2
Asterisk=1.4.0-beta2
Asterisk=1.2.7
Digium Asterisk Appliance Developer Kit
Digium Asterisk s800i Appliance=1.0.1
Asterisk=1.2.10
Digium AsteriskNOW=1.0.1
Asterisk=1.2.17
Asterisk Business Edition=b.1.3.3
Asterisk=1.4.5
Asterisk=1.2.7.1
Asterisk=1.2.7-netsec
Asterisk=1.2.17-netsec
Asterisk=1.2.20
Asterisk=1.2.4
Asterisk Business Edition=b.2.3.4
Asterisk=1.4.0-beta3
Asterisk=1.0.8
Asterisk=1.4.18
Asterisk=1.2.15-netsec
Asterisk=1.2.22
Asterisk=1.2.5-netsec
Asterisk=1.4.16
Asterisk=1.4.14
Asterisk=1.2.16
Asterisk=1.2.12.1
Asterisk=1.2.9
Asterisk=1.4.16.1
Asterisk=1.2.21.1
Asterisk=1.2.8-netsec
Asterisk=1.2.26.1-netsec
Asterisk=1.0.0
Asterisk=1.2.19
Asterisk Business Edition=b.2.2.1
Asterisk Business Edition=a
Asterisk=1.4.19-rc1
Asterisk=1.2.28
Asterisk Business Edition=b.2.3.2
Asterisk Business Edition<=b2.5.1
Asterisk=1.2.21.1-netsec
Asterisk Business Edition=c.1.0-beta7
Asterisk=1.4.8
Asterisk=1.4.17
Asterisk=1.2.6
Digium AsteriskNOW=1.0
Asterisk=1.2.18
Asterisk=1.2.22-netsec
Asterisk=1.2.23-netsec
Asterisk=1.0.11.1

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2008-1923?

    The severity of CVE-2008-1923 is classified as high due to its potential to cause a denial of service.

  • How do I fix CVE-2008-1923?

    To fix CVE-2008-1923, ensure that your Asterisk configuration does not allow unauthenticated calls.

  • Which versions are affected by CVE-2008-1923?

    CVE-2008-1923 affects Asterisk versions 1.2 before revision 72630 and 1.4 before revision 65679.

  • Can CVE-2008-1923 be exploited remotely?

    Yes, CVE-2008-1923 can be exploited remotely by attackers sending unauthenticated calls to unverified IP addresses.

  • Is there a workaround for CVE-2008-1923?

    A recommended workaround for CVE-2008-1923 is to disable unauthenticated calls in the Asterisk configuration.

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