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Vulnerability record · CVE-2008-3263 · published 22 July 2008

CVE-2008-3263: Asterisk vulnerability

Asterisk · Asterisk

The IAX2 protocol 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 (call-number exhaustion and CPU consumption) by quickly sending a large number of IAX2 (IAX) POKE requests.

7.8 CVSS 2.0 High EPSS 28% · top 2.0% CWE-399 · CWE-399
7.8CVSS 2.0 base score
28%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
24References, 4 tagged exploit
16 Jun 2026Last modified by NVD

Description

The IAX2 protocol 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 (call-number exhaustion and CPU consumption) by quickly sending a large number of IAX2 (IAX) POKE requests.

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

Affected products

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

References

LinkTags
http://downloads.digium.com/pub/security/AST-2008-010.html
http://downloads.securityfocus.com/vulnerabilities/exploits/30321.pl Exploit
http://secunia.com/advisories/31178
http://secunia.com/advisories/31194
http://secunia.com/advisories/34982
http://security.gentoo.org/glsa/glsa-200905-01.xml
http://www.securityfocus.com/archive/1/494675/100/0/threaded
http://www.securityfocus.com/bid/30321 Exploit
http://www.securitytracker.com/id?1020535
http://www.vupen.com/english/advisories/2008/2168/references
https://exchange.xforce.ibmcloud.com/vulnerabilities/43942
https://www.redhat.com/archives/fedora-package-announce/2008-July/msg00839.html
http://downloads.digium.com/pub/security/AST-2008-010.html
http://downloads.securityfocus.com/vulnerabilities/exploits/30321.pl Exploit
http://secunia.com/advisories/31178
http://secunia.com/advisories/31194
http://secunia.com/advisories/34982
http://security.gentoo.org/glsa/glsa-200905-01.xml
http://www.securityfocus.com/archive/1/494675/100/0/threaded
http://www.securityfocus.com/bid/30321 Exploit
http://www.securitytracker.com/id?1020535
http://www.vupen.com/english/advisories/2008/2168/references
https://exchange.xforce.ibmcloud.com/vulnerabilities/43942
https://www.redhat.com/archives/fedora-package-announce/2008-July/msg00839.html

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Related vulnerabilities

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

10.0CVE-2007-2488Asterisk vulnerabilityThe IAX2 channel driver (chan_iax2) in Asterisk before 20070504 does not properly null terminate data, which allows remote attackers to trigger loss …EPSS 4.3%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%8.8CVE-2024-42365Asterisk vulnerabilityAsterisk is an open source private branch exchange (PBX) and telephony toolkit. Prior to asterisk versions 18.24.2, 20.9.2, and 21.4.2 and certified-…EPSS 4.7%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-2007-2294Asterisk vulnerabilityThe Manager Interface in Asterisk before 1.2.18 and 1.4.x before 1.4.3 allows remote attackers to cause a denial of service (crash) by using MD5 auth…EPSS 3.9%7.8CVE-2007-2297Asterisk vulnerabilityThe SIP channel driver (chan_sip) in Asterisk before 1.2.18 and 1.4.x before 1.4.3 does not properly parse SIP UDP packets that do not contain a vali…EPSS 2.4%

Source: NIST National Vulnerability Database (record CVE-2008-3263), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.