Moderate severityNVD Advisory· Published Feb 8, 2013· Updated Jun 16, 2026
CVE-2013-0263
CVE-2013-0263
Description
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
rackRubyGems | >= 1.5.0, < 1.5.2 | 1.5.2 |
rackRubyGems | >= 1.4.0, < 1.4.5 | 1.4.5 |
rackRubyGems | >= 1.3.0, < 1.3.10 | 1.3.10 |
rackRubyGems | >= 1.2.0, < 1.2.8 | 1.2.8 |
rackRubyGems | >= 1.1.0, < 1.1.6 | 1.1.6 |
Affected products
34cpe:2.3:a:rack_project:rack:1.1.0:*:*:*:*:*:*:*+ 27 more
- cpe:2.3:a:rack_project:rack:1.1.0:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.1.4:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.1.5:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.1.6:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.2.1:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.2.2:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.2.3:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.2.4:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.2.6:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.2.7:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.3.0:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.3.1:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.3.2:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.3.3:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.3.4:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.3.5:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.3.6:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.3.7:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.3.8:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.3.9:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.4.0:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.4.1:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.4.2:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.4.3:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.4.4:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.5.0:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.5.1:*:*:*:*:*:*:*
- ghsa-coords6 versionspkg:gem/rackpkg:rpm/opensuse/ruby3.2-rubygem-rack-2.2&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/ruby3.2-rubygem-rack&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/rubyem-rack&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/rubygem-rack-2.2&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/rubygem-rack&distro=openSUSE%20Tumbleweed
>= 1.5.0, < 1.5.2+ 5 more
- (no CPE)range: >= 1.5.0, < 1.5.2
- (no CPE)range: < 2.2.7-1.1
- (no CPE)range: < 3.0.7-1.2
- (no CPE)range: < 1.4.7-1.8
- (no CPE)range: < 2.2.4-1.1
- (no CPE)range: < 2.2.3.1-1.1
Patches
Vulnerability mechanics
References
25- rack.github.comnvdVendor Advisory
- secunia.com/advisories/52033nvdVendor Advisory
- secunia.com/advisories/52134nvdVendor Advisory
- github.com/advisories/GHSA-xc85-32mf-xpv8ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2013-0263ghsaADVISORY
- lists.opensuse.org/opensuse-updates/2013-03/msg00048.htmlnvdWEB
- rhn.redhat.com/errata/RHSA-2013-0686.htmlnvdWEB
- www.debian.org/security/2013/dsa-2783nvdWEB
- bugzilla.redhat.com/show_bug.cginvdWEB
- gist.github.com/codahale/f9f3781f7b54985bee94nvdWEB
- github.com/rack/rack/commit/0cd7e9aa397f8ebb3b8481d67dbac8b4863a7f07nvdWEB
- github.com/rack/rack/commit/9a81b961457805f6d1a5c275d053068440421e11nvdWEB
- groups.google.com/d/msg/rack-devel/xKrHVWeNvDM/4ZGA576CnK4JnvdWEB
- groups.google.com/forum/ghsaWEB
- groups.google.com/forum/ghsaWEB
- groups.google.com/forum/ghsaWEB
- groups.google.com/forum/ghsaWEB
- secunia.com/advisories/52774nvd
- www.osvdb.org/89939nvd
- groups.google.com/forum/nvd
- groups.google.com/forum/nvd
- groups.google.com/forum/nvd
- groups.google.com/forum/nvd
- puppet.com/security/cve/cve-2013-0263nvd
- twitter.com/coda/statuses/299732877745197056nvd
News mentions
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