CVE-2011-4121 Weak cryptography in OpenSSL extension of Ruby (Git trunk)
The Ruby OpenSSL extension generated weak RSA keys with an exponent of 1, allowing attackers to bypass integrity checks or corrupt services relying on these keys.
- 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-2011-4121?
CVE-2011-4121 is a critical vulnerability in Ruby-Lang Ruby, published on 26 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The OpenSSL extension of Ruby (Git trunk) versions after 2011-09-01 up to 2011-11-03 always generated an exponent value of '1' to be used for private RSA key generation. A remote attacker could use this flaw to bypass or corrupt integrity of services, depending on strong private RSA keys generation mechanism.
Weakness: CWE-326
Which versions are affected by CVE-2011-4121?
It affects 1 product.
Products include Ruby-Lang Ruby.
How do I fix CVE-2011-4121?
No fix has been published for CVE-2011-4121 yet. Limit exposure of the affected software until one is available.
Is CVE-2011-4121 being exploited?
There is no known exploitation of CVE-2011-4121 in the wild and no public exploit code.
Other vulnerabilities in Ruby-Lang Ruby
Sources
Also known as GHSA-mjg4-5rfj-952f.