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,…
- 4.3MediumCVSS base score
- 2.7%Exploitation in 30 daysEPSS · top 14% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By mitre
- 3 days later
· 3 days later
Published
- 16 years later
· 16 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 2.7% · top 14% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Affected products
n/a
- affected n/a
References
27
- GLSA-200905-01 (opens in a new tab)vendor-advisoryx_transferred
- 29927 (opens in a new tab)third-party-advisoryx_transferred
- asterisk-iax2protocol-ack-dos(41966) (opens in a new tab)vdb-entryx_transferred
- 28901 (opens in a new tab)vdb-entryx_transferred
- 30010 (opens in a new tab)third-party-advisoryx_transferred
- ADV-2008-1324 (opens in a new tab)vdb-entryx_transferred
- http://downloads.digium.com/pub/security/AST-2008-006.html (opens in a new tab)x_transferred
- http://bugs.digium.com/view.php?id=10078 (opens in a new tab)x_transferred
- FEDORA-2008-3390 (opens in a new tab)vendor-advisoryx_transferred
- 20080422 AST-2008-006 - 3-way handshake in IAX2 incomplete (opens in a new tab)mailing-listx_transferred
- http://www.altsci.com/concepts/page.php?s=asteri&p=2 (opens in a new tab)x_transferred
- 30042 (opens in a new tab)third-party-advisoryx_transferred
- DSA-1563 (opens in a new tab)vendor-advisoryx_transferred
- 34982 (opens in a new tab)third-party-advisoryx_transferred
- 1019918 (opens in a new tab)vdb-entryx_transferred
- FEDORA-2008-3365 (opens in a new tab)vendor-advisoryx_transferred
- https://downloads.asterisk.org/pub/security/AST-2008-006.html (opens in a new tab)x_transferred
- https://github.com/xrg/asterisk-xrg/commit/51714a24347dc57f9a208a4a8af84115ef407b83 (opens in a new tab)x_transferred
- https://github.com/jcollie/asterisk/commit/a8b180875b037b8da26f6a3bcc8e5e98b8c904d2 (opens in a new tab)x_transferred
- https://github.com/xrg/asterisk-xrg/commit/10da3dab24e8ca08cf2c983f8d0206e383535b5a (opens in a new tab)x_transferred
- https://github.com/jcollie/asterisk/commit/771b3d8749b34b6eea4e03a2e514380da9582f90 (opens in a new tab)x_transferred
- https://github.com/pruiz/asterisk/commit/e0ef9bd22810c6969a7f222eec04798f19a7e2d6 (opens in a new tab)x_transferred
- https://github.com/jcollie/asterisk/commit/60de4fbbdf3ede49f158e23a9e3b679f2e519c1e (opens in a new tab)x_transferred
- https://github.com/mojolingo/asterisk/commit/20ac3662f137dbf7f42d5295590069a7d3b1166b (opens in a new tab)x_transferred
- https://github.com/silentindark/asterisk-1/commit/fe8b7f31db687f8b9992864b82c93d22833019c7 (opens in a new tab)x_transferred
- https://github.com/kaoru6/asterisk/commit/1fe14f38dd43dc894d21f85762b51208ba5c8acb (opens in a new tab)x_transferred
- https://github.com/lyx2014/Asterisk/commit/0670e43c30135044e25cca7f80e1833e2c128653 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2008-1897 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2008-1897)Record last updated .