CVE-2011-1473 Denial of service in n/a
Remote attackers can cause denial of service via CPU exhaustion by exploiting improper restrictions on client-initiated SSL/TLS renegotiations in OpenSSL.
- 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-2011-1473?
CVE-2011-1473 is a medium-severity denial of service vulnerability in Openssl Openssl, published on 16 Jun 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OpenSSL before 0.9.8l, and 0.9.8m through 1.x, does not properly restrict client-initiated renegotiation within the SSL and TLS protocols, which might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection, a different vulnerability than CVE-2011-5094. NOTE: it can also be argued that it is the responsibility of server deployments, not a security library, to prevent or limit renegotiation when it is inappropriate within a specific environment
Weakness: CWE-264
Which versions are affected by CVE-2011-1473?
It affects 1 product.
Products include Openssl Openssl.
How do I fix CVE-2011-1473?
No fix has been published for CVE-2011-1473 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-2011-1473 being exploited?
There is no known exploitation of CVE-2011-1473 in the wild and no public exploit code.
Public exploit code: 3 proofs of concept on GitHub.
Other vulnerabilities in Openssl Openssl
Sources
Also known as GHSA-5wj2-7gqw-v6cm.