CVE-2003-0688 Denial of service in n/a
Remote attackers can crash Sendmail via invalid DNS responses when the enhdnsbl feature is enabled, causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2003-0688?
CVE-2003-0688 is a medium-severity denial of service vulnerability in Freebsd Freebsd, published on 3 Sep 2003. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The DNS map code in Sendmail 8.12.8 and earlier, when using the "enhdnsbl" feature, does not properly initialize certain data structures, which allows remote attackers to cause a denial of service (process crash) via an invalid DNS response that causes Sendmail to free incorrect data.
Which versions are affected by CVE-2003-0688?
It affects 6 products.
Products include Compaq Tru64, Freebsd Freebsd, Openbsd Openbsd, Redhat Sendmail, Sendmail Sendmail, Sgi Irix.
How do I fix CVE-2003-0688?
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-2003-0688 being exploited?
There is no known exploitation of CVE-2003-0688 in the wild and no public exploit code.
Other vulnerabilities in Freebsd Freebsd
Sources
Also known as DEBIAN-CVE-2003-0688, GHSA-g82v-vwh4-vpjc.