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CVE-2006-4023

5.0 · MEDIUM

The ip2long function in PHP 5.1.4 and earlier may incorrectly validate an arbitrary string and return a valid network IP address, which allows remote attackers to obtain network information and fac…

Published Aug 9, 2006phpEPSS 5.75%

Overview

CVE-2006-4023 is a medium-severity vulnerability affecting php php. It was published on August 9, 2006 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The ip2long function in PHP 5.1.4 and earlier may incorrectly validate an arbitrary string and return a valid network IP address, which allows remote attackers to obtain network information and facilitate other attacks, as demonstrated using SQL injection in the X-FORWARDED-FOR Header in index.php in MiniBB 2.0. NOTE: it could be argued that the ip2long behavior represents a risk for security-relevant issues in a way that is similar to strcpy's role in buffer overflows, in which case this would be a class of implementation bugs that would require separate CVE items for each PHP application that uses ip2long in a security-relevant manner.

Remediation

Check the references section for vendor advisories and patches from php. Update php 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

References

Refretrogod.altervista.org/php_ip2long.htmRefsecuritytracker.com/id?1016609Refwww.securityfocus.com/archive/1/441529/100/100/threadedRefwww.securityfocus.com/archive/1/441708/100/100/threadedRefretrogod.altervista.org/php_ip2long.htmRefsecuritytracker.com/id?1016609Refwww.securityfocus.com/archive/1/441529/100/100/threadedRefwww.securityfocus.com/archive/1/441708/100/100/threaded

How CyberStrike helps

Frequently asked questions

What is CVE-2006-4023?

CVE-2006-4023 is a medium-severity vulnerability affecting php php. It was published on August 9, 2006 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2006-4023?

This vulnerability has a CVSS 2.0 base score of 5.0, 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-2006-4023?

Check the references section for vendor advisories and patches from php. Update php 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-2006-4023?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2006-4023 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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