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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,…

Medium4.3EPSS 2.7%
Published
Updated
Reserved
Assigned by
mitre

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.

Scores

CVSS scores of CVE-2008-1897, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified2.0Medium4.3AV:N/AC:M/Au:N/C:N/I:N/A:P
EPSS (exploitation in 30 days)
2.7% · top 14% of all CVEs (3 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.

Weakness

Affected products

  • n/a

    • affected n/a

References (27)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .