CVE-2016-6307 Denial of service in n/a
Remote attackers can cause denial of service via memory consumption in OpenSSL by sending crafted TLS messages due to improper length checking.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-6307?
CVE-2016-6307 is a medium-severity denial of service vulnerability in Openssl Openssl, published on 26 Sep 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The state-machine implementation in OpenSSL 1.1.0 before 1.1.0a allocates memory before checking for an excessive length, which might allow remote attackers to cause a denial of service (memory consumption) via crafted TLS messages, related to statem/statem.c and statem/statem_lib.c.
Weakness: CWE-400
Which versions are affected by CVE-2016-6307?
It affects 1 product.
Products include Openssl Openssl.
How do I fix CVE-2016-6307?
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-2016-6307 being exploited?
There is no known exploitation of CVE-2016-6307 in the wild and no public exploit code.
Other vulnerabilities in Openssl Openssl
Sources
Also known as GHSA-6486-qv2g-xg8h.