CVE-2011-0633
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…
Does this matter?
Lower severity and a low EPSS score (4.25%). Track it; it rarely justifies an emergency change on its own.
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 2.0
- 4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N
- EPSS
- 4.25% probability · 90th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- gisle aas/libwww-perl · search.cpan/libwww-perl
- Source
- cve@mitre.org
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.html
- 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.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.