{"id":"CVE-2008-1897","aliases":["DEBIAN-CVE-2008-1897","DSA-1563-1","EUVD-2008-1897","GHSA-653q-fj3p-cqrg"],"status":"published","title":"The IAX2 channel driver (chan_iax2) in Asterisk Open Source 1.0.x, 1.2.x before 1.2.28, and 1.4.x...","description":"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.","severity":{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02743,"percentile":0.86269,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-287"],"published":"2008-04-23T00:00:00Z","modified":"2026-10-23T17:47:23Z","fixes":[{"ecosystem":"Debian:14","package":"asterisk","fixed_in":["1:1.4.19.1~dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:4.0","package":"asterisk","fixed_in":["1:1.2.13~dfsg-2etch4"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:14","package":"asterisk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.4.19.1~dfsg-1"}]}],"versions":["0.1.11-3","0.1.11-3woody1","1:1.0.5-2","1:1.0.5-4","1:1.0.6-1","1:1.0.6-2","1:1.0.7-1","1:1.0.7.dfsg.1-1","1:1.0.7.dfsg.1-2","1:1.0.7.dfsg.1-2sarge1","1:1.0.7.dfsg.1-2sarge2","1:1.0.7.dfsg.1-2sarge3","1:1.0.7.dfsg.1-2sarge4","1:1.0.7.dfsg.1-2sarge5","1:1.0.7.dfsg.1-2sarge6","1:1.0.9.dfsg-1","1:1.0.9.dfsg-3","1:1.0.9.dfsg-4","1:1.0.9.dfsg-5","1:1.0.9.dfsg-6","1:1.2.0-beta1.dfsg-1","1:1.2.0-beta2.dfsg-1","1:1.2.0-beta2.dfsg-2","1:1.2.0-beta2.dfsg-3","1:1.2.0-rc1.dfsg-1","1:1.2.0-rc2.dfsg-1","1:1.2.0.dfsg-1","1:1.2.0.dfsg-2","1:1.2.0.dfsg-3","1:1.2.0.dfsg-4","1:1.2.0.dfsg-5","1:1.2.0.dfsg-6","1:1.2.1.dfsg-1","1:1.2.1.dfsg-2","1:1.2.1.dfsg-3","1:1.2.10.dfsg-1","1:1.2.10.dfsg-1bpo1","1:1.2.10.dfsg-2","1:1.2.10.dfsg-3","1:1.2.11.dfsg-1","1:1.2.12.1.dfsg-1","1:1.2.13~dfsg-1","1:1.2.13~dfsg-2","1:1.2.13~dfsg-2etch1","1:1.2.13~dfsg-2etch2","1:1.2.13~dfsg-2etch3","1:1.2.13~dfsg-2etch4","1:1.2.14~dfsg-1","1:1.2.14~dfsg-2","1:1.2.14~dfsg-3","1:1.2.14~dfsg-4","1:1.2.15~dfsg-1","1:1.2.16~dfsg-1","1:1.2.17~dfsg-1","1:1.2.4.dfsg-1","1:1.2.4.dfsg-2","1:1.2.4.dfsg-3","1:1.2.4.dfsg-4","1:1.2.4.dfsg-5","1:1.2.4.dfsg-6","1:1.2.4.dfsg-6+b1","1:1.2.4.dfsg-7","1:1.2.7.1.dfsg-1","1:1.2.7.1.dfsg-2","1:1.2.7.1.dfsg-3","1:1.2.9.1.dfsg-1","1:1.4.10~dfsg-1","1:1.4.11~dfsg-1","1:1.4.11~dfsg-2","1:1.4.11~dfsg-3","1:1.4.11~dfsg-4","1:1.4.13~dfsg-1","1:1.4.15~dfsg-1","1:1.4.16.2~dfsg-1","1:1.4.16.2~dfsg-2","1:1.4.17~dfsg-1","1:1.4.17~dfsg-2","1:1.4.18.1~dfsg-1","1:1.4.18~dfsg-1","1:1.4.2~dfsg-1","1:1.4.2~dfsg-2","1:1.4.2~dfsg-3","1:1.4.2~dfsg-4","1:1.4.2~dfsg-5","1:1.4.3~dfsg-1","1:1.4.4~dfsg-1","1:1.4.4~dfsg-2","1:1.4.4~dfsg-3","1:1.4.5~dfsg-1","1:1.4.6~dfsg-1","1:1.4.8~dfsg-1","1:1.4.8~dfsg-2","1:1.4.9~dfsg-1"]},{"source":"osv","ecosystem":"Debian:4.0","package":"asterisk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.2.13~dfsg-2etch4"}]}],"versions":["1:1.2.13~dfsg-2","1:1.2.13~dfsg-2etch1","1:1.2.13~dfsg-2etch2","1:1.2.13~dfsg-2etch3"]}],"products":[{"vendor":"asterisk","product":"asterisk_appliance_developer_kit"},{"vendor":"asterisk","product":"asterisk_business_edition"},{"vendor":"asterisk","product":"asterisknow"},{"vendor":"asterisk","product":"open_source"},{"vendor":"asterisk","product":"s800i"}],"references":[{"url":"http://security.gentoo.org/glsa/glsa-200905-01.xml","tags":["vendor-advisory","x_transferred","advisory"]},{"url":"http://secunia.com/advisories/29927","tags":["third-party-advisory","x_transferred","Vendor Advisory","advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/41966","tags":["vdb-entry","x_transferred","web"]},{"url":"http://www.securityfocus.com/bid/28901","tags":["vdb-entry","x_transferred","web"]},{"url":"http://secunia.com/advisories/30010","tags":["third-party-advisory","x_transferred","Vendor Advisory","advisory"]},{"url":"http://www.vupen.com/english/advisories/2008/1324","tags":["vdb-entry","x_transferred","advisory"]},{"url":"http://downloads.digium.com/pub/security/AST-2008-006.html","tags":["x_transferred","web"]},{"url":"http://bugs.digium.com/view.php?id=10078","tags":["x_transferred","web"]},{"url":"https://www.redhat.com/archives/fedora-package-announce/2008-April/msg00600.html","tags":["vendor-advisory","x_transferred","web"]},{"url":"http://www.securityfocus.com/archive/1/491220/100/0/threaded","tags":["mailing-list","x_transferred","web"]},{"url":"http://www.altsci.com/concepts/page.php?s=asteri\u0026p=2","tags":["x_transferred","web"]},{"url":"http://secunia.com/advisories/30042","tags":["third-party-advisory","x_transferred","Vendor Advisory","advisory"]},{"url":"http://www.debian.org/security/2008/dsa-1563","tags":["vendor-advisory","x_transferred","advisory"]},{"url":"http://secunia.com/advisories/34982","tags":["third-party-advisory","x_transferred","advisory"]},{"url":"http://www.securitytracker.com/id?1019918","tags":["vdb-entry","x_transferred","web"]},{"url":"https://www.redhat.com/archives/fedora-package-announce/2008-April/msg00581.html","tags":["vendor-advisory","x_transferred","web"]},{"url":"https://downloads.asterisk.org/pub/security/AST-2008-006.html","tags":["x_transferred","web"]},{"url":"https://github.com/xrg/asterisk-xrg/commit/51714a24347dc57f9a208a4a8af84115ef407b83","tags":["x_transferred","fix"]},{"url":"https://github.com/jcollie/asterisk/commit/a8b180875b037b8da26f6a3bcc8e5e98b8c904d2","tags":["x_transferred","fix"]},{"url":"https://github.com/xrg/asterisk-xrg/commit/10da3dab24e8ca08cf2c983f8d0206e383535b5a","tags":["x_transferred","fix"]},{"url":"https://github.com/jcollie/asterisk/commit/771b3d8749b34b6eea4e03a2e514380da9582f90","tags":["x_transferred","fix"]},{"url":"https://github.com/pruiz/asterisk/commit/e0ef9bd22810c6969a7f222eec04798f19a7e2d6","tags":["x_transferred","fix"]},{"url":"https://github.com/jcollie/asterisk/commit/60de4fbbdf3ede49f158e23a9e3b679f2e519c1e","tags":["x_transferred","fix"]},{"url":"https://github.com/mojolingo/asterisk/commit/20ac3662f137dbf7f42d5295590069a7d3b1166b","tags":["x_transferred","fix"]},{"url":"https://github.com/silentindark/asterisk-1/commit/fe8b7f31db687f8b9992864b82c93d22833019c7","tags":["x_transferred","fix"]},{"url":"https://github.com/kaoru6/asterisk/commit/1fe14f38dd43dc894d21f85762b51208ba5c8acb","tags":["x_transferred","fix"]},{"url":"https://github.com/lyx2014/Asterisk/commit/0670e43c30135044e25cca7f80e1833e2c128653","tags":["x_transferred","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2008-1897"},{"url":"https://github.com/advisories/GHSA-653q-fj3p-cqrg"},{"url":"https://security-tracker.debian.org/tracker/CVE-2008-1897","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2008-1897","description":"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.","status":"published","published":"2008-04-23T00:00:00Z","modified":"2024-08-07T08:40:59.845Z","updated_at":"2026-11-02T14:34:47.71012Z"}],"euvd":[{"id":"EUVD-2008-1897","description":"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.","status":"published","published":"2008-04-23T00:00:00Z","modified":"2024-08-07T08:40:59Z","updated_at":"2026-11-03T01:38:59.763671Z"}],"ghsa":[{"id":"GHSA-653q-fj3p-cqrg","title":"The IAX2 channel driver (chan_iax2) in Asterisk Open Source 1.0.x, 1.2.x before 1.2.28, and 1.4.x...","description":"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.","status":"published","published":"2022-05-01T23:44:38Z","modified":"2023-10-28T05:03:32Z","cwes":["CWE-287"],"updated_at":"2026-11-02T14:54:48.16134Z"}],"nvd":[{"id":"CVE-2008-1897","description":"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.","status":"published","published":"2008-04-23T16:05:00Z","modified":"2026-06-16T22:52:42.703Z","cvss":[{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:01:26.27008Z"}],"osv":[{"id":"CVE-2008-1897","description":"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.","status":"published","published":"2008-04-23T16:05:00Z","modified":"2026-04-10T03:39:49.769745Z","updated_at":"2026-11-02T15:43:57.178433Z"},{"id":"DEBIAN-CVE-2008-1897","description":"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.","status":"published","published":"2008-04-23T16:05:00Z","modified":"2026-10-23T17:47:23.988570116Z","updated_at":"2026-11-02T15:45:23.742363Z"},{"id":"DSA-1563-1","title":"asterisk - denial of service","status":"published","published":"2008-04-30T00:00:00Z","modified":"2026-03-09T01:01:04.397801Z","updated_at":"2026-11-02T15:46:14.734124Z"}]}}