{"id":"GHSA-6mq2-37j5-w6r6","summary":"WEBrick Improper Input Validation vulnerability","details":"WEBrick 1.3.1 in Ruby 1.8.6 through patchlevel 383, 1.8.7 through patchlevel 248, 1.8.8dev, 1.9.1 through patchlevel 376, and 1.9.2dev writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.","aliases":["CVE-2009-4492"],"modified":"2025-05-22T17:48:00.252889Z","published":"2017-10-24T18:33:38Z","database_specific":{"nvd_published_at":"2010-01-13T20:30:00Z","cwe_ids":["CWE-20"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2020-06-16T21:19:44Z"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2009-4492"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-6mq2-37j5-w6r6"},{"type":"PACKAGE","url":"https://github.com/ruby/webrick"},{"type":"WEB","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/webrick/CVE-2009-4492.yml"},{"type":"WEB","url":"https://web.archive.org/web/20100113155532/http://www.vupen.com/english/advisories/2010/0089"},{"type":"WEB","url":"https://web.archive.org/web/20100815010948/http://secunia.com/advisories/37949"},{"type":"WEB","url":"https://web.archive.org/web/20170402100552/http://securitytracker.com/id?1023429"},{"type":"WEB","url":"https://web.archive.org/web/20170908140655/http://www.securityfocus.com/archive/1/508830/100/0/threaded"},{"type":"WEB","url":"https://web.archive.org/web/20200228145937/http://www.securityfocus.com/bid/37710"},{"type":"WEB","url":"http://www.redhat.com/support/errata/RHSA-2011-0908.html"},{"type":"WEB","url":"http://www.redhat.com/support/errata/RHSA-2011-0909.html"},{"type":"WEB","url":"http://www.ruby-lang.org/en/news/2010/01/10/webrick-escape-sequence-injection"},{"type":"WEB","url":"http://www.ush.it/team/ush/hack_httpd_escape/adv.txt"}],"affected":[{"package":{"name":"webrick","ecosystem":"RubyGems","purl":"pkg:gem/webrick"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.0"}]}],"versions":["1.3.1","1.4.0.beta1"],"database_specific":{"last_known_affected_version_range":"\u003c= 1.3.1","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2017/10/GHSA-6mq2-37j5-w6r6/GHSA-6mq2-37j5-w6r6.json"}}],"schema_version":"1.9.0"}