CVE-2013-0263

    Dashboard / Vulnerabilities / CVE-2013-0263

    CVE-2013-0263

    Published: 8 Feb 2013Last Modified: 23 Mar 2026

    Summary:

    Details: 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.

    References: http://rack.github.com/, http://rhn.redhat.com/errata/RHSA-2013-0686.html, http://secunia.com/advisories/52033, http://secunia.com/advisories/52134, http://secunia.com/advisories/52774, http://www.debian.org/security/2013/dsa-2783, https://github.com/rack/rack/commit/0cd7e9aa397f8ebb3b8481d67dbac8b4863a7f07, https://github.com/rack/rack/commit/9a81b961457805f6d1a5c275d053068440421e11, https://bugzilla.redhat.com/show_bug.cgi?id=909071, http://lists.opensuse.org/opensuse-updates/2013-03/msg00048.html, http://www.osvdb.org/89939, https://gist.github.com/codahale/f9f3781f7b54985bee94, 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

    Affected packages

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2013-0263 | CVE-DB