Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gisle Aas | Libwww-Perl | 0.01 |
| Search.Cpan | Libwww-Perl | <= 5.837 |
Related Weaknesses (CWE)
References
- http://cpansearch.perl.org/src/GAAS/libwww-perl-6.02/Changes
- http://vttynotes.blogspot.com/2010/12/man-in-middle-fun-with-perl-lwp.html
- http://vttynotes.blogspot.com/2011/03/quick-note-on-lwp-and-perl-security-cve.ht
- http://cpansearch.perl.org/src/GAAS/libwww-perl-6.02/Changes
- http://vttynotes.blogspot.com/2010/12/man-in-middle-fun-with-perl-lwp.html
- http://vttynotes.blogspot.com/2011/03/quick-note-on-lwp-and-perl-security-cve.ht
FAQ
What is CVE-2011-0633?
CVE-2011-0633 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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...
How severe is CVE-2011-0633?
CVE-2011-0633 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2011-0633?
Check the references section above for vendor advisories and patch information. Affected products include: Gisle Aas Libwww-Perl, Search.Cpan Libwww-Perl.