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Last updated: 6/1/2016 12:56:27 AM

CVE Publication rate: 19.57

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Vulnerability Workload Index: 12.29
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NVD is a product of the NIST Computer Security Division and is sponsored by the Department of Homeland Security's National Cyber Security Division. It supports the U.S. government multi-agency (OSD, DHS, NSA, DISA, and NIST) Information Security Automation Program. It is the U.S. government content repository for the Security Content Automation Protocol (SCAP).

National Cyber Awareness System

Vulnerability Summary for CVE-2013-0263

Original release date: 02/08/2013
Last revised: 11/18/2013


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.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 5.1 MEDIUM
Impact Subscore: 6.4
Exploitability Subscore: 4.9
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: High
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

References to Advisories, Solutions, and Tools

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External Source: CONFIRM
Name: https://groups.google.com/forum/#!msg/rack-devel/hz-liLb9fKE/8jvVWU6xYiYJ
External Source: CONFIRM
Name: https://github.com/rack/rack/commit/0cd7e9aa397f8ebb3b8481d67dbac8b4863a7f07
External Source: MISC
Name: https://twitter.com/coda/statuses/299732877745197056
External Source: MISC
Name: https://gist.github.com/codahale/f9f3781f7b54985bee94
External Source: MISC
Name: https://bugzilla.redhat.com/show_bug.cgi?id=909071
External Source: CONFIRM
Name: https://groups.google.com/forum/#!msg/rack-devel/RnQxm6i13C4/xfakH81yWvgJ
External Source: CONFIRM
Name: https://groups.google.com/forum/#!msg/rack-devel/mZsuRonD7G8/DpZIOmMLbOgJ
External Source: CONFIRM
Name: https://groups.google.com/d/msg/rack-devel/xKrHVWeNvDM/4ZGA576CnK4J
External Source: DEBIAN
Name: DSA-2783
External Source: CONFIRM
Name: https://github.com/rack/rack/commit/9a81b961457805f6d1a5c275d053068440421e11
External Source: CONFIRM
Name: https://groups.google.com/forum/#!msg/rack-devel/bf937jPZxJM/1s6x95vIhmAJ
External Source: SUSE
Name: openSUSE-SU-2013:0462
External Source: REDHAT
Name: RHSA-2013:0686
External Source: CONFIRM
Name: http://rack.github.com/
Type: Advisory

Technical Details

Vulnerability Type (View All)