CVE-2009-0362 Denial of service in n/a
Remote attackers can cause denial of service in Fail2ban by sending crafted DNS names that trigger forced authentication failures due to a regex flaw.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2009-0362?
CVE-2009-0362 is a medium-severity denial of service vulnerability in n/a, published on 13 Feb 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
filter.d/wuftpd.conf in Fail2ban 0.8.3 uses an incorrect regular expression that allows remote attackers to cause a denial of service (forced authentication failures) via a crafted reverse-resolved DNS name (rhost) entry that contains a substring that is interpreted as an IP address, a different vulnerability than CVE-2007-4321.
Weakness: CWE-287
Which versions are affected by CVE-2009-0362?
It affects 1 product.
Products include Fail2ban Fail2ban.
How do I fix CVE-2009-0362?
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-2009-0362 being exploited?
There is no known exploitation of CVE-2009-0362 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2009-0362, GHSA-rc77-w9xr-6vvf.