CVE-2008-1897
asterisk - denial of service
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.
How to fix CVE-2008-1897
To remediate CVE-2008-1897, upgrade the affected package to a fixed version below.
- —upgrade to 1:1.4.19.1~dfsg-1 or later
- —upgrade to 1:1.2.13~dfsg-2etch4 or later
Is CVE-2008-1897 being exploited?
Low — EPSS is 3.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1:1.4.19.1~dfsg-1
- from 0, < 1:1.2.13~dfsg-2etch4