#VU30579 Inadequate Encryption Strength in Ruby - CVE-2011-4121
Published: November 26, 2019 / Updated: July 17, 2020
Vulnerability identifier: #VU30579
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2011-4121
CWE-ID: CWE-326
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Ruby
Ruby
Software vendor:
Ruby
Ruby
Description
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
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.
Remediation
Install update from vendor's website.