What’s Vulnerable › Vulnerabilities

CVE-2014-2734

• Severity: medium (CVSS 5.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2014-04-24 · updated 2026-06-17
• Weakness: CWE-399

Description

The openssl extension in Ruby 2.x does not properly maintain the state of process memory after a file is reopened, which allows remote attackers to spoof signatures within the context of a Ruby script that attempts signature verification after performing a certain sequence of filesystem operations. NOTE: this issue has been disputed by the Ruby OpenSSL team and third parties, who state that the original demonstration PoC contains errors and redundant or unnecessarily-complex code that does not appear to be related to a demonstration of the issue. As of 20140502, CVE is not aware of any public comment by the original researcher

Affected products

• Ruby: 2.0, 2.0.0, 2.0.0-p0, 2.0.0-p195, 2.0.0-p247, 2.0.0-preview1 (+6)

References

• http://packetstormsecurity.com/files/126218/Ruby-OpenSSL-Private-Key-Spoofing.html
• http://seclists.org/fulldisclosure/2014/Apr/231
• http://seclists.org/fulldisclosure/2014/May/13
• http://www.osvdb.org/106006
• http://www.securityfocus.com/bid/66956
• https://gist.github.com/10446549
• https://gist.github.com/emboss/91696b56cd227c8a0c13
• https://github.com/adrienthebo/cve-2014-2734/
• https://news.ycombinator.com/item?id=7601973
• https://www.ruby-lang.org/en/news/2014/05/09/dispute-of-vulnerability-cve-2014-2734/
• http://packetstormsecurity.com/files/126218/Ruby-OpenSSL-Private-Key-Spoofing.html
• http://seclists.org/fulldisclosure/2014/Apr/231

Get alerted when CVE-2014-2734 or the next vulnerability affects your stack