CVE-2013-0263
MEDIUM · CVSS 5.1EPSS 5.4%EU EUVD
Rack::Session::Cookie in Rack 1.5.x before 1.5.2, 1.4.x before 1.4.5, 1.3.x before 1.3.10, 1.2.x before 1.2.8, and 1.1.x before 1.1.6 allows remote attackers to guess the session cookie, gain privileges, and execute arbitrary code via a timing attack involving an HMAC comparison function that does not run in constant time.
Key facts
- CVSS score
- 5.1 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:H/Au:N/C:P/I:P/A:P- EPSS score
- 5.4% (93th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2022-5763)
- Published
- February 8, 2013
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2022-5763 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- rack project / rack
- rack project / rack
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- rack project / rack
- rack project / rack
- rack project / rack
- rack project / rack
- rack project / rack
- rack project / rack
- rack project / rack
- rack project / rack
- rack project / rack
- rack project / rack
- rack project / rack
- rack project / rack
- rack project / rack
- rack project / rack
- rack project / rack
- rack project / rack
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- rack project / rack
References
- http://lists.opensuse.org/opensuse-updates/2013-03/msg00048.html
- http://rack.github.com/(Vendor Advisory)
- http://rhn.redhat.com/errata/RHSA-2013-0686.html
- http://secunia.com/advisories/52033(Vendor Advisory)
- http://secunia.com/advisories/52134(Vendor Advisory)
- http://secunia.com/advisories/52774
- http://www.debian.org/security/2013/dsa-2783
- http://www.osvdb.org/89939
- https://bugzilla.redhat.com/show_bug.cgi?id=909071
- https://gist.github.com/codahale/f9f3781f7b54985bee94
- https://github.com/rack/rack/commit/0cd7e9aa397f8ebb3b8481d67dbac8b4863a7f07
- https://github.com/rack/rack/commit/9a81b961457805f6d1a5c275d053068440421e11
- https://groups.google.com/d/msg/rack-devel/xKrHVWeNvDM/4ZGA576CnK4J
- https://groups.google.com/forum/#%21msg/rack-devel/RnQxm6i13C4/xfakH81yWvgJ
- https://groups.google.com/forum/#%21msg/rack-devel/bf937jPZxJM/1s6x95vIhmAJ
- https://groups.google.com/forum/#%21msg/rack-devel/hz-liLb9fKE/8jvVWU6xYiYJ
- https://groups.google.com/forum/#%21msg/rack-devel/mZsuRonD7G8/DpZIOmMLbOgJ
- https://puppet.com/security/cve/cve-2013-0263
- https://twitter.com/coda/statuses/299732877745197056
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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