CVE-2013-0156
HIGHEPSS 100th pctlDescription
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.
CVSS v2 Vector
No CVSS vector data available.
Exploit Intelligence
Very high risk: more likely to be exploited than 100% of all known CVEs.
References
- http://ics-cert.us-cert.gov/advisories/ICSA-13-036-01A
- http://lists.apple.com/archives/security-announce/2013/Mar/msg00002.html
- http://rhn.redhat.com/errata/RHSA-2013-0153.html
- http://rhn.redhat.com/errata/RHSA-2013-0154.html
- http://rhn.redhat.com/errata/RHSA-2013-0155.html
- http://weblog.rubyonrails.org/2013/1/28/Rails-3-0-20-and-2-3-16-have-been-released/
- http://www.debian.org/security/2013/dsa-2604
- http://www.fujitsu.com/global/support/software/security/products-f/sw-sv-rcve-ror201301e.html
- http://www.insinuator.net/2013/01/rails-yaml/
- http://www.kb.cert.org/vuls/id/380039
- http://www.kb.cert.org/vuls/id/628463
- https://community.rapid7.com/community/metasploit/blog/2013/01/09/serialization-mischief-in-ruby-land-cve-2013-0156
- https://groups.google.com/group/rubyonrails-security/msg/c1432d0f8c70e89d?dmode=source&output=gplain
- https://puppet.com/security/cve/cve-2013-0156
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.