CVE-2011-0633

    Dashboard / Vulnerabilities / CVE-2011-0633

    CVE-2011-0633

    Published: 13 May 2011Last Modified: 10 Apr 2026

    Summary:

    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.

    References: 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

    Affected packages

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High