CVE-2015-3420 Denial of service in n/a
Remote attackers can crash the login process in Dovecot when SSLv3 is disabled, causing a 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-2015-3420?
CVE-2015-3420 is a medium-severity denial of service vulnerability in Dovecot Dovecot, published on 19 Sep 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The ssl-proxy-openssl.c function in Dovecot before 2.2.17, when SSLv3 is disabled, allow remote attackers to cause a denial of service (login process crash) via vectors related to handshake failures.
Weakness: CWE-295
Which versions are affected by CVE-2015-3420?
It affects 2 products.
Products include Dovecot Dovecot, Fedoraproject Fedora.
How do I fix CVE-2015-3420?
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-2015-3420 being exploited?
There is no known exploitation of CVE-2015-3420 in the wild and no public exploit code.
Other vulnerabilities in Dovecot Dovecot
Sources
Also known as DEBIAN-CVE-2015-3420, GHSA-2h34-774g-95vx.