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CVE-2011-0633

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, d…

Published May 13, 2011gisle_aasCWE-20EPSS 4.25%

Overview

CVE-2011-0633 is a medium-severity vulnerability affecting gisle_aas libwww-perl. It was published on May 13, 2011 and has a CVSS 2.0 base score of 4.3 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from gisle_aas. Update libwww-perl to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
search.cpanlibwww-perl0Affected

References

Refcpansearch.perl.org/src/GAAS/libwww-perl-6.02/ChangesRefvttynotes.blogspot.com/2010/12/man-in-middle-fun-with-perl-lwp.htmlRefvttynotes.blogspot.com/2011/03/quick-note-on-lwp-and-perl-security-cve.htmlRefcpansearch.perl.org/src/GAAS/libwww-perl-6.02/ChangesRefvttynotes.blogspot.com/2010/12/man-in-middle-fun-with-perl-lwp.htmlRefvttynotes.blogspot.com/2011/03/quick-note-on-lwp-and-perl-security-cve.html

How CyberStrike helps

Frequently asked questions

What is CVE-2011-0633?

CVE-2011-0633 is a medium-severity vulnerability affecting gisle_aas libwww-perl. It was published on May 13, 2011 and has a CVSS 2.0 base score of 4.3 (MEDIUM).

How severe is CVE-2011-0633?

This vulnerability has a CVSS 2.0 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-0633?

Check the references section for vendor advisories and patches from gisle_aas. Update libwww-perl to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-0633?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-0633 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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