{"id":"CVE-2011-0633","details":"The Net::HTTPS module in libwww-perl (LWP) before 6.00, as used in WWW::Mechanize, LWP::UserAgent, and other products, when running in environments that do not set the If-SSL-Cert-Subject header, does not enable full validation of SSL certificates by default, which allows remote attackers to spoof servers via man-in-the-middle (MITM) attacks involving hostnames that are not properly validated.  NOTE: it could be argued that this is a design limitation of the Net::HTTPS API, and separate implementations should be independently assigned CVE identifiers for not working around this limitation. However, because this API was modified within LWP, a single CVE identifier has been assigned.","modified":"2026-04-10T03:41:37.896081Z","published":"2011-05-13T22:55:01Z","references":[{"type":"ARTICLE","url":"http://vttynotes.blogspot.com/2010/12/man-in-middle-fun-with-perl-lwp.html"},{"type":"ARTICLE","url":"http://vttynotes.blogspot.com/2011/03/quick-note-on-lwp-and-perl-security-cve.html"},{"type":"WEB","url":"http://cpansearch.perl.org/src/GAAS/libwww-perl-6.02/Changes"}],"schema_version":"1.7.5"}