CVE-2014-2734

Exp

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

Published: 2014-04-24 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2014-2734 is rated High Exploit Risk (69.8/100): CVSS Medium severity, with high exploitation likelihood (EPSS 5.35%, 92th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2014-2734

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2014-2734

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 5.80% 5.35% -0.45%
2 2025-12-28 6.98% 5.80% -1.19%
3 2025-12-27 — 6.98% —

Full EPSS history (20 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2014-2734

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 4.9 [email protected]

Weakness enumeration for CVE-2014-2734

OS Trackers for CVE-2014-2734

vendor priority summary link
redhat low — https://access.redhat.com/security/cve/CVE-2014-2734
ubuntu low CVE-2014-2734 low priority: Ubuntu including 4 source packages (ruby1.8, ruby1.9, ruby1.9.1, ruby2.0), 24 status rows across 6 suites (lucid, precise, quantal, saucy, trusty, upstream): DNE 10, ignored 10, needed 4. https://ubuntu.com/security/CVE-2014-2734

Affected software / configurations for CVE-2014-2734

Vendor Product Version Raw CPE
ruby-lang ruby 2.0 cpe:2.3:a:ruby-lang:ruby:2.0:*:*:*:*:*:*:*
ruby-lang ruby 2.0.0 cpe:2.3:a:ruby-lang:ruby:2.0.0:*:*:*:*:*:*:*
ruby-lang ruby 2.0.0 cpe:2.3:a:ruby-lang:ruby:2.0.0:p0:*:*:*:*:*:*
ruby-lang ruby 2.0.0 cpe:2.3:a:ruby-lang:ruby:2.0.0:p195:*:*:*:*:*:*
ruby-lang ruby 2.0.0 cpe:2.3:a:ruby-lang:ruby:2.0.0:p247:*:*:*:*:*:*
ruby-lang ruby 2.0.0 cpe:2.3:a:ruby-lang:ruby:2.0.0:preview1:*:*:*:*:*:*
ruby-lang ruby 2.0.0 cpe:2.3:a:ruby-lang:ruby:2.0.0:preview2:*:*:*:*:*:*
ruby-lang ruby 2.0.0 cpe:2.3:a:ruby-lang:ruby:2.0.0:rc1:*:*:*:*:*:*
ruby-lang ruby 2.0.0 cpe:2.3:a:ruby-lang:ruby:2.0.0:rc2:*:*:*:*:*:*
ruby-lang ruby 2.1 cpe:2.3:a:ruby-lang:ruby:2.1:-:*:*:*:*:*:*
ruby-lang ruby 2.1 cpe:2.3:a:ruby-lang:ruby:2.1:preview1:*:*:*:*:*:*
ruby-lang ruby 2.1.1 cpe:2.3:a:ruby-lang:ruby:2.1.1:*:*:*:*:*:*:*

References for CVE-2014-2734

cvelogic Threat Intelligence