{"id":"CVE-2008-1897","state":"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 before 1.4.19.1; Business Edition A.x.x, B.x.x before B.2.5.2, and C.x.x before C.","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.","publishedAt":"2008-04-23T00:00:00.000Z","updatedAt":"2024-08-07T08:40:59.845Z","severity":null,"assigner":"mitre","products":["n/a n/a"],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":["http://security.gentoo.org/glsa/glsa-200905-01.xml","http://secunia.com/advisories/29927","https://exchange.xforce.ibmcloud.com/vulnerabilities/41966","http://www.securityfocus.com/bid/28901","http://secunia.com/advisories/30010","http://www.vupen.com/english/advisories/2008/1324","http://downloads.digium.com/pub/security/AST-2008-006.html","http://bugs.digium.com/view.php?id=10078","https://www.redhat.com/archives/fedora-package-announce/2008-April/msg00600.html","http://www.securityfocus.com/archive/1/491220/100/0/threaded","http://www.altsci.com/concepts/page.php?s=asteri&p=2","http://secunia.com/advisories/30042","http://www.debian.org/security/2008/dsa-1563","http://secunia.com/advisories/34982","http://www.securitytracker.com/id?1019918","https://www.redhat.com/archives/fedora-package-announce/2008-April/msg00581.html","https://downloads.asterisk.org/pub/security/AST-2008-006.html","https://github.com/xrg/asterisk-xrg/commit/51714a24347dc57f9a208a4a8af84115ef407b83","https://github.com/jcollie/asterisk/commit/a8b180875b037b8da26f6a3bcc8e5e98b8c904d2","https://github.com/xrg/asterisk-xrg/commit/10da3dab24e8ca08cf2c983f8d0206e383535b5a","https://github.com/jcollie/asterisk/commit/771b3d8749b34b6eea4e03a2e514380da9582f90","https://github.com/pruiz/asterisk/commit/e0ef9bd22810c6969a7f222eec04798f19a7e2d6","https://github.com/jcollie/asterisk/commit/60de4fbbdf3ede49f158e23a9e3b679f2e519c1e","https://github.com/mojolingo/asterisk/commit/20ac3662f137dbf7f42d5295590069a7d3b1166b","https://github.com/silentindark/asterisk-1/commit/fe8b7f31db687f8b9992864b82c93d22833019c7","https://github.com/kaoru6/asterisk/commit/1fe14f38dd43dc894d21f85762b51208ba5c8acb","https://github.com/lyx2014/Asterisk/commit/0670e43c30135044e25cca7f80e1833e2c128653"],"weaknesses":[],"ingestedAt":"2026-10-29T19:38:49.659Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2008/1xxx/CVE-2008-1897.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2008-1897","state":"PUBLISHED","datePublished":"2008-04-23T00:00:00.000Z","dateUpdated":"2024-08-07T08:40:59.845Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2008-04-20T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"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.  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