{"id":"CVE-2013-4363","aliases":["GHSA-9qvm-2vhf-q649"],"url":"https://o3.security/vulnerability/CVE-2013-4363","summary":"RubyGems Regular Expression Denial of Service","details":"Algorithmic complexity vulnerability in Gem::Version::ANCHORED_VERSION_PATTERN in lib/rubygems/version.rb in RubyGems before 1.8.23.2, 1.8.24 through 1.8.26, 2.0.x before 2.0.10, and 2.1.x before 2.1.5, as used in Ruby 1.9.0 through 2.0.0p247, allows remote attackers to cause a denial of service (CPU consumption) via a crafted gem version that triggers a large amount of backtracking in a regular expression.  NOTE: this issue is due to an incomplete fix for CVE-2013-4287.","published":"2013-10-17T23:55:04Z","modified":"2026-04-16T06:25:50.153260563Z","cvss":null,"epss":{"score":0.0169,"percentile":0.75955,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"RubyGems","name":"rubygems-update","fixedVersion":"1.8.23.2"},{"ecosystem":"RubyGems","name":"rubygems-update","fixedVersion":"1.8.27"},{"ecosystem":"RubyGems","name":"rubygems-update","fixedVersion":"2.0.10"},{"ecosystem":"RubyGems","name":"rubygems-update","fixedVersion":"2.1.5"}],"fix":null,"references":[{"type":"ADVISORY","url":"http://blog.rubygems.org/2013/09/24/CVE-2013-4363.html"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2013/09/14/3"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2013/09/18/8"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2013/09/20/1"},{"type":"WEB","url":"https://puppet.com/security/cve/cve-2013-4363"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2013-4363"},{"type":"PACKAGE","url":"https://github.com/rubygems/rubygems"},{"type":"WEB","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rubygems-update/CVE-2013-4363.yml"},{"type":"WEB","url":"https://web.archive.org/web/20170331150441/https://puppet.com/security/cve/cve-2013-4363"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-04-16T06:25:50.153260563Z"}}