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Fencer Intel
high 7.5

CVE-2013-0333 in the critical feed json

activesupport in Rails vulnerable to incorrect data conversion

published 13y ago modified 4mo ago also GHSA-xgr2-v94m-rc9g , EUVD-2017-0331

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
95.6%
EPSS 95.6% chance of exploitation in 30 days, percentile 99.8%
public exploits
3
Metasploit and Exploit-DB

Summary

lib/active_support/json/backends/yaml.rb in Ruby on Rails 2.3.x before 2.3.16 and 3.0.x before 3.0.20 does not properly convert JSON data to YAML data for processing by a YAML parser, which allows remote attackers to execute arbitrary code, conduct SQL injection attacks, or bypass authentication via crafted data that triggers unsafe decoding, a different vulnerability than CVE-2013-0156.

Patch / fix

  • rubygems activesupport 2.3.16, 3.0.20
  • rails Debian 14, Debian 13, Debian 12 2.3.14.1

debian advisories DEBIAN-CVE-2013-0333

  • rubygem-activesupport openshift 1 1:3.0.13-4.el6op

red hat advisories RHSA-2013:0202

Is CVE-2013-0333 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2013-0333 updated cvss 7.5

rubygem-activesupport: json to yaml parsing

  • Red Hat CloudForms Cloud Engine for RHEL 6 Server rubygem-activesupport 3.0.10-9.el6cf Red Hat CloudForms System Engine for RHEL 6 Server katello 1.1.12.1-1.el6cf, katello-all 1.1.12.1-1.el6cf, katello-common 1.1.12.1-1.el6cf, katello-glue-pulp 1.1.12.1-1.el6cf, rubygem-activesupport 3.0.10-9.el6cf, katello-glue-candlepin 1.1.12.1-1.el6cf
    fixed: vendor fix RHSA-2013:0203
  • Red Hat OpenShift Enterprise Infrastructure rubygem-activesupport 3.0.13-4.el6op Red Hat OpenShift Enterprise Node rubygem-activesupport 3.0.13-4.el6op
    fixed: vendor fix RHSA-2013:0202
  • Red Hat Subscription Asset Manager for RHEL 6 Server rubygem-activesupport 3.0.10-7.el6cf
    fixed: vendor fix RHSA-2013:0201
  • Red Hat OpenShift Enterprise 1 ruby193-rubygem-activesupport
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (Metasploit exploit/multi/http/rails_json_yaml_code_exec)
  2. Published

Exploit prediction

95.57% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected packages

ecosystem package affected fixed in
rubygems activesupport
>=2.3.2, <2.3.16
>=3.0.0, <3.0.20
2.3.16
3.0.20

Classification

Weakness
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.