{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "medium"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "asterisk"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:1.4.19.1~dfsg-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "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.",
  "id": "DEBIAN-CVE-2008-1897",
  "modified": "2026-09-01T19:48:41.959663457Z",
  "published": "2008-04-23T16:05:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2008-1897"
    }
  ],
  "upstream": [
    "CVE-2008-1897"
  ]
}