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CVE-2008-1891

5.0 · MEDIUM

Directory traversal vulnerability in WEBrick in Ruby 1.8.4 and earlier, 1.8.5 before 1.8.5-p231, 1.8.6 before 1.8.6-p230, 1.8.7 before 1.8.7-p22, and 1.9.0 before 1.9.0-2, when using NTFS or FAT fi…

Published Apr 18, 2008ruby-langCWE-22EPSS 2.79%

Overview

CVE-2008-1891 is a medium-severity vulnerability affecting ruby-lang ruby. It was published on April 18, 2008 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

Directory traversal vulnerability in WEBrick in Ruby 1.8.4 and earlier, 1.8.5 before 1.8.5-p231, 1.8.6 before 1.8.6-p230, 1.8.7 before 1.8.7-p22, and 1.9.0 before 1.9.0-2, when using NTFS or FAT filesystems, allows remote attackers to read arbitrary CGI files via a trailing (1) + (plus), (2) %2b (encoded plus), (3) . (dot), (4) %2e (encoded dot), or (5) %20 (encoded space) character in the URI, possibly related to the WEBrick::HTTPServlet::FileHandler and WEBrick::HTTPServer.new functionality and the :DocumentRoot option.

Remediation

Check the references section for vendor advisories and patches from ruby-lang. Update ruby 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
ruby-langruby0Affected

References

Refaluigi.altervista.org/adv/webrickcgi-adv.txtReflists.opensuse.org/opensuse-security-announce/2008-08/msg00006.htmlRefsecunia.com/advisories/29794Refsecunia.com/advisories/30831Refsecunia.com/advisories/31687Refwww.mandriva.com/security/advisories?name=MDVSA-2008:140Refwww.mandriva.com/security/advisories?name=MDVSA-2008:141Refwww.ruby-lang.org/en/news/2008/06/20/arbitrary-code-execution-vulnerabilities/Refwww.vupen.com/english/advisories/2008/1245/referencesRefexchange.xforce.ibmcloud.com/vulnerabilities/41824

How CyberStrike helps

Frequently asked questions

What is CVE-2008-1891?

CVE-2008-1891 is a medium-severity vulnerability affecting ruby-lang ruby. It was published on April 18, 2008 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2008-1891?

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-2008-1891?

Check the references section for vendor advisories and patches from ruby-lang. Update ruby 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-2008-1891?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2008-1891 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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