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Vulnerability record · CVE-2008-1923 · published 23 April 2008

CVE-2008-1923: Asterisk appliance developer kit vulnerability

Asterisk · Asterisk Appliance Developer Kit

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.

7.1 CVSS 2.0 High EPSS 1.4% · top 28.6% CWE-16 · CWE-16
7.1CVSS 2.0 base score
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
8References
16 Jun 2026Last modified by NVD

Description

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.

AV:N/AC:M/Au:N/C:N/I:N/A:C

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://bugs.digium.com/view.php?id=10078
http://downloads.digium.com/pub/security/AST-2008-006.html
http://www.altsci.com/concepts/page.php?s=asteri&p=1
https://exchange.xforce.ibmcloud.com/vulnerabilities/42049
http://bugs.digium.com/view.php?id=10078
http://downloads.digium.com/pub/security/AST-2008-006.html
http://www.altsci.com/concepts/page.php?s=asteri&p=1
https://exchange.xforce.ibmcloud.com/vulnerabilities/42049

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.3CVE-2008-1390Asterisk vulnerabilityThe AsteriskGUI HTTP server in Asterisk Open Source 1.4.x before 1.4.19-rc3 and 1.6.x before 1.6.0-beta6, Business Edition C.x.x before C.1.6, Asteri…EPSS 3.8%9.3CVE-2007-3762Asterisk vulnerabilityStack-based buffer overflow in 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,…EPSS 5.5%9.0CVE-2012-2186Asterisk open source vulnerabilityIncomplete blacklist vulnerability in main/manager.c in Asterisk Open Source 1.8.x before 1.8.15.1 and 10.x before 10.7.1, Certified Asterisk 1.8.11 …EPSS 3.6%8.8CVE-2008-1332Asterisk permissions and access controls vulnerabilityUnspecified vulnerability in Asterisk Open Source 1.2.x before 1.2.27, 1.4.x before 1.4.18.1 and 1.4.19-rc3; Business Edition A.x.x, B.x.x before B.2…EPSS 2.3%7.8CVE-2009-2346Asterisk memory buffer overflow vulnerabilityThe IAX2 protocol implementation in Asterisk Open Source 1.2.x before 1.2.35, 1.4.x before 1.4.26.2, 1.6.0.x before 1.6.0.15, and 1.6.1.x before 1.6.…EPSS 2.6%7.8CVE-2008-3264Asterisk appliance developer kit improper authentication vulnerabilityThe 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…EPSS 3.4%7.5CVE-2013-2685Asterisk open source memory buffer overflow vulnerabilityStack-based buffer overflow in res/res_format_attr_h264.c in Asterisk Open Source 11.x before 11.2.2 allows remote attackers to execute arbitrary cod…EPSS 2.6%7.5CVE-2008-1289Asterisk appliance developer kit memory buffer overflow vulnerabilityMultiple buffer overflows in Asterisk Open Source 1.4.x before 1.4.18.1 and 1.4.19-rc3, Open Source 1.6.x before 1.6.0-beta6, Business Edition C.x.x …EPSS 12%

Source: NIST National Vulnerability Database (record CVE-2008-1923), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.