CVE-2008-1897
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.
Key facts
- CVSS score
- 4.3 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:M/Au:N/C:N/I:N/A:P- Weakness (CWE)
- CWE-287
- EPSS score
- 2.7% (86th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2008-1897)
- Published
- April 23, 2008
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2008-1897 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- asterisk / asterisk appliance developer kit
- asterisk / asterisk appliance developer kit
- asterisk / asterisk appliance developer kit
- asterisk / asterisk appliance developer kit
- asterisk / asterisk appliance developer kit
- asterisk / asterisk appliance developer kit
- asterisk / asterisk appliance developer kit
- asterisk / asterisk appliance developer kit
- asterisk / asterisk business edition
- asterisk / asterisk business edition
- asterisk / asterisk business edition
- asterisk / asterisk business edition
- asterisk / asterisk business edition
- asterisk / asterisk business edition
- asterisk / asterisk business edition
- asterisk / asterisk business edition
- asterisk / asterisk business edition
- asterisk / asterisk business edition
- asterisk / asterisk business edition
- asterisk / asterisk business edition
- asterisk / asterisk business edition
- asterisk / asterisk business edition
- asterisk / asterisk business edition
- asterisk / asterisk business edition
- asterisk / asterisk business edition
- asterisk / asterisknow
- asterisk / asterisknow
- asterisk / asterisknow
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
- asterisk / open source
and 93 more…
References
- 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
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
Query CVEs from your AI assistant
The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.
Add the CVE brain