CVE-2013-0156

Home/CVE/active_support/core_ext/hash/conversions.rb in Ruby on Rails before 2.3.15, 3.0.x before 3.0.19, 3.1.x before 3.1.10, an

CVE

active_support/core_ext/hash/conversions.rb in Ruby on Rails before 2.3.15, 3.0.x before 3.0.19, 3.1.x before 3.1.10, an

active_support/core_ext/hash/conversions.rb in Ruby on Rails before 2.3.15, 3.0.x before 3.0.19, 3.1.x before 3.1.10, and 3.2.x before 3.2.11 does not properly restrict casts of string values, which allows remote attackers to conduct object-injection attacks and execute arbitrary code, or cause a denial of service (memory and CPU consumption) involving nested XML entity references, by leveraging Action Pack support for (1) YAML type conversion or (2) Symbol type conversion.

HIGH · CVSS 7.5 EPSS 0.91907

Act now

EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
EPSS percentile: top 0% of all CVEs by exploitation likelihood
Public exploit or PoC is available
CVSS base score ≥ 7.0

Sigma rules1 YARA rules0

⬡

Weakness Classification

CWE-20Improper Input Validation

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Affected Products & Versions

rubyonrails rails>= 3.2.0 and < 3.2.11
rubyonrails ruby on rails< 2.3.15
rubyonrails ruby on rails>= 3.0.0 and < 3.0.19
rubyonrails ruby on rails>= 3.1.0 and < 3.1.10
debian linuxall versions

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Affected Packages

Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.

RubyGems actionpack HIGH fixed in 2.3.15

⚠

Public Exploits & PoCs

remoteRuby on Rails - Known Secret Session Cookie Remote Code Execution (Metasploit)verified
remoteRuby on Rails - XML Processor YAML Deserialization Code Execution (Metasploit)verified
nucleiInfoblox NetMRI < 7.6.1 - Remote Code Execution via Hardcoded Ruby Cookie Secret Keycritical

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Sigma Hunt Rules

Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.

productmediumRuby on Rails Framework Exceptions

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Scoring & Timeline

7.5

HIGH · CVSS v2 (legacy) · secalert@redhat.com

View on NVD

This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.

v2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Published to NVD13 Jan 2013 · 10:55 PM

⚑

Vendor Advisories

suse-csafopenSUSE-SU-2026:10355-1
suse-csafopenSUSE-SU-2025:15122-1
suse-csafopenSUSE-SU-2024:14173-1
suse-csafopenSUSE-SU-2024:10188-1
suse-csafopenSUSE-SU-2024:11339-1
Show all 12 vendor advisoriessuse-csafopenSUSE-SU-2024:13164-1
rhsaRHSA-2013:0203Critical
rhsaRHSA-2013:0202Critical
rhsaRHSA-2013:0201Critical
rhsaRHSA-2013:0155Important
rhsaRHSA-2013:0154Important
rhsaRHSA-2013:0153Critical

🔗

References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

http://ics-cert.us-cert.gov/advisories/ICSA-13-036-01AThird Party AdvisoryUS Government Resource

http://lists.apple.com/archives/security-announce/2013/Mar/msg00002.htmlMailing ListThird Party Advisory

http://rhn.redhat.com/errata/RHSA-2013-0153.htmlThird Party Advisory

http://rhn.redhat.com/errata/RHSA-2013-0154.htmlThird Party Advisory

http://rhn.redhat.com/errata/RHSA-2013-0155.htmlThird Party Advisory

http://weblog.rubyonrails.org/2013/1/28/Rails-3-0-20-and-2-3-16-have-been-released/Vendor Advisory

Show all 14 references

http://www.debian.org/security/2013/dsa-2604Third Party Advisory

http://www.fujitsu.com/global/support/software/security/products-f/sw-sv-rcve-ror201301e.htmlThird Party Advisory

http://www.insinuator.net/2013/01/rails-yaml/Third Party Advisory

http://www.kb.cert.org/vuls/id/380039Third Party AdvisoryUS Government Resource

http://www.kb.cert.org/vuls/id/628463Third Party AdvisoryUS Government Resource

https://community.rapid7.com/community/metasploit/blog/2013/01/09/serialization-mischief-in-ruby-land-cve-2013-0156Third Party Advisory

https://groups.google.com/group/rubyonrails-security/msg/c1432d0f8c70e89d?dmode=source&output=gplainThird Party Advisory

https://puppet.com/security/cve/cve-2013-0156Third Party Advisory

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