CVE-2008-1897 Denial of service in n/a
Remote attackers can cause denial of service via traffic amplification in Asterisk when unauthenticated calls are enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2008-1897?
CVE-2008-1897 is a medium-severity denial of service vulnerability in n/a, published on 23 Apr 2008. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-287
Which versions are affected by CVE-2008-1897?
It affects 5 products.
Products include Asterisk Asterisk Appliance Developer Kit, Asterisk Asterisk Business Edition, Asterisk Asterisknow, Asterisk Open Source, Asterisk S800i.
How do I fix CVE-2008-1897?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2008-1897 being exploited?
There is no known exploitation of CVE-2008-1897 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2008-1897, DSA-1563-1, GHSA-653q-fj3p-cqrg.