CVE-2021-36093 DoS attack using PostMaster filters
Attackers can cause a denial of service by sending emails that get stuck in PostMaster filters, affecting OTRS ticket system administrators.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-36093?
CVE-2021-36093 is a medium-severity denial of service vulnerability in Otrs Otrs, published on 6 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
It's possible to create an email which can be stuck while being processed by PostMaster filters, causing DoS. This issue affects: OTRS AG ((OTRS)) Community Edition 6.0.x version 6.0.1 and later versions. OTRS AG OTRS 7.0.x version 7.0.28 and prior versions; 8.0.x version 8.0.15 and prior versions.
Weakness: CWE-185
Which versions are affected by CVE-2021-36093?
It affects 1 product.
Products include Otrs Otrs.
How do I fix CVE-2021-36093?
No fix has been published for CVE-2021-36093 yet. Limit exposure of the affected software until one is available.
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-2021-36093 being exploited?
There is no known exploitation of CVE-2021-36093 in the wild and no public exploit code.
Other vulnerabilities in Otrs Otrs
Sources
Also known as GHSA-p8h5-xqwr-ww86, UBUNTU-CVE-2021-36093.