CVE-2020-7046 Denial of service in n/a
An attacker can cause a denial of service in Dovecot by sending truncated UTF-8 data, triggering an infinite loop in the submission-login 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-2020-7046?
CVE-2020-7046 is a high-severity denial of service vulnerability in Dovecot Dovecot, published on 12 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
lib-smtp in submission-login and lmtp in Dovecot 2.3.9 before 2.3.9.3 mishandles truncated UTF-8 data in command parameters, as demonstrated by the unauthenticated triggering of a submission-login infinite loop.
Weakness: CWE-835
Which versions are affected by CVE-2020-7046?
It affects 2 products.
Products include Dovecot Dovecot, Fedoraproject Fedora.
How do I fix CVE-2020-7046?
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-2020-7046 being exploited?
There is no known exploitation of CVE-2020-7046 in the wild and no public exploit code.
Other vulnerabilities in Dovecot Dovecot
Sources
Also known as ALPINE-CVE-2020-7046, GHSA-xxqf-cf9x-9rwq.