How severe is CVE-2014-2734?

CVE-2014-2734 has a CVSS 2.0 base score of 5.8, rated medium severity.

Is CVE-2014-2734 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-2734?

CVE-2014-2734 primarily affects Ruby-lang Ruby. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-2734?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2014-2734 published?

CVE-2014-2734 was published on 2014-04-24 and last updated on 2026-06-17.

CVE-2014-2734

CVE-2014-2734 is a medium-severity vulnerability in Ruby-lang Ruby with a CVSS 2.0 base score of 5.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Severity: Medium (CVSS 2.0 base score 5.8)
EPSS exploit prediction: 5% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Ruby-lang Ruby
Published: 2014-04-24
Last modified: 2026-06-17

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

Frequently asked questions

What is CVE-2014-2734?: 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
How severe is CVE-2014-2734?: CVE-2014-2734 has a CVSS 2.0 base score of 5.8, rated medium severity.
Is CVE-2014-2734 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-2734?: CVE-2014-2734 primarily affects Ruby-lang Ruby. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2014-2734?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2014-2734 published?: CVE-2014-2734 was published on 2014-04-24 and last updated on 2026-06-17.

References

Affected products (12)

cpe:2.3:a:ruby-lang:ruby:2.0:*:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:p0:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:p195:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:p247:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:preview1:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:preview2:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:rc1:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:rc2:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.1:-:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.1:preview1:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.1.1:*:*:*:*:*:*:*

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Other CWE-399 (Resource Management Errors) vulnerabilities

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CVE-2015-0339 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
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