Vulnerability record · CVE-2008-1897 · published 23 April 2008

CVE-2008-1897: Asterisk appliance developer kit improper authentication vulnerability

Asterisk · Asterisk Appliance Developer Kit

The IAX2 channel driver (chan_iax2) in Asterisk Open Source 1.0.x, 1.2.x before 1.2.28, and 1.4.x before 1.4.19.1; Business Edition A.x.x, B.x.x before B.2.5.2, and C.x.x before C.1.8.1; AsteriskNOW before 1.0.3; Appliance Developer Kit 0.x.x; and s800i before 1.1.0.3, when configured to allow unauthenticated calls, does not verify that an ACK response contains a call number matching the server's reply to a NEW message, which allows remote attackers to cause a denial of service (traffic amplification) via a spoofed ACK response that does not complete a 3-way handshake. NOTE: this issue exists because of an incomplete fix for CVE-2008-1923.

4.3 CVSS 2.0 Medium EPSS 2.7% · top 14.4% CWE-287 · Improper authentication

4.3CVSS 2.0 base score

2.7%EPSS exploitation probability, 30 days

NoNot in CISA KEV

5Affected product versions listed by NVD

54References

16 Jun 2026Last modified by NVD

Description

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

Affected products

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

Asterisk Appliance Developer Kit Asterisk

Asterisk Business Edition Asterisk

Asterisknow Asterisk

Open Source Asterisk

S800i Asterisk

References

Link	Tags
http://bugs.digium.com/view.php?id=10078
http://downloads.digium.com/pub/security/AST-2008-006.html
http://secunia.com/advisories/29927	Vendor Advisory
http://secunia.com/advisories/30010	Vendor Advisory
http://secunia.com/advisories/30042	Vendor Advisory
http://secunia.com/advisories/34982
http://security.gentoo.org/glsa/glsa-200905-01.xml
http://www.altsci.com/concepts/page.php?s=asteri&p=2
http://www.debian.org/security/2008/dsa-1563
http://www.securityfocus.com/archive/1/491220/100/0/threaded
http://www.securityfocus.com/bid/28901
http://www.securitytracker.com/id?1019918
http://www.vupen.com/english/advisories/2008/1324
https://downloads.asterisk.org/pub/security/AST-2008-006.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/41966
https://github.com/jcollie/asterisk/commit/60de4fbbdf3ede49f158e23a9e3b679f2e519c1e
https://github.com/jcollie/asterisk/commit/771b3d8749b34b6eea4e03a2e514380da9582f90
https://github.com/jcollie/asterisk/commit/a8b180875b037b8da26f6a3bcc8e5e98b8c904d2
https://github.com/kaoru6/asterisk/commit/1fe14f38dd43dc894d21f85762b51208ba5c8acb
https://github.com/lyx2014/Asterisk/commit/0670e43c30135044e25cca7f80e1833e2c128653
https://github.com/mojolingo/asterisk/commit/20ac3662f137dbf7f42d5295590069a7d3b1166b
https://github.com/pruiz/asterisk/commit/e0ef9bd22810c6969a7f222eec04798f19a7e2d6
https://github.com/silentindark/asterisk-1/commit/fe8b7f31db687f8b9992864b82c93d22833019c7
https://github.com/xrg/asterisk-xrg/commit/10da3dab24e8ca08cf2c983f8d0206e383535b5a
https://github.com/xrg/asterisk-xrg/commit/51714a24347dc57f9a208a4a8af84115ef407b83
https://www.redhat.com/archives/fedora-package-announce/2008-April/msg00581.html
https://www.redhat.com/archives/fedora-package-announce/2008-April/msg00600.html
http://bugs.digium.com/view.php?id=10078
http://downloads.digium.com/pub/security/AST-2008-006.html
http://secunia.com/advisories/29927	Vendor Advisory
http://secunia.com/advisories/30010	Vendor Advisory
http://secunia.com/advisories/30042	Vendor Advisory
http://secunia.com/advisories/34982
http://security.gentoo.org/glsa/glsa-200905-01.xml
http://www.altsci.com/concepts/page.php?s=asteri&p=2
http://www.debian.org/security/2008/dsa-1563
http://www.securityfocus.com/archive/1/491220/100/0/threaded
http://www.securityfocus.com/bid/28901
http://www.securitytracker.com/id?1019918
http://www.vupen.com/english/advisories/2008/1324

Track CVE-2008-1897 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

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%24 Mar 2008 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%18 Jul 2007 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%31 Aug 2012 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%20 Mar 2008 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%8 Sep 2009 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%24 Jul 2008 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%1 Apr 2013 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%24 Mar 2008

Source: NIST National Vulnerability Database (record CVE-2008-1897), CISA KEV, FIRST EPSS (scores of 2026-09-30). This page is refreshed as NVD updates the record.