CVE-2016-6302 Denial of service in n/a
Remote attackers can cause a denial of service in OpenSSL by sending a TLS ticket that is too short, bypassing HMAC size validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-6302?
CVE-2016-6302 is a high-severity denial of service vulnerability in Openssl Openssl, published on 16 Sep 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The tls_decrypt_ticket function in ssl/t1_lib.c in OpenSSL before 1.1.0 does not consider the HMAC size during validation of the ticket length, which allows remote attackers to cause a denial of service via a ticket that is too short.
Weakness: CWE-20
Which versions are affected by CVE-2016-6302?
It affects 3 products.
Products include Openssl Openssl, Oracle Linux, Oracle Solaris.
How do I fix CVE-2016-6302?
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-2016-6302 being exploited?
There is no known exploitation of CVE-2016-6302 in the wild and no public exploit code.
Other vulnerabilities in Openssl Openssl
Sources
Also known as ALPINE-CVE-2016-6302, DEBIAN-CVE-2016-6302, GHSA-h9vm-qp4h-23fm, UBUNTU-CVE-2016-6302.