CVE-2008-1891
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.
Key facts
- CVSS score
- 5.0 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:N/A:N- Weakness (CWE)
- CWE-22
- EPSS score
- 2.8% (86th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2008-1891)
- Published
- April 18, 2008
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2008-1891 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- ruby-lang / ruby
- ruby-lang / ruby
- ruby-lang / ruby
References
- http://aluigi.altervista.org/adv/webrickcgi-adv.txt
- http://lists.opensuse.org/opensuse-security-announce/2008-08/msg00006.html
- http://secunia.com/advisories/29794(Vendor Advisory)
- http://secunia.com/advisories/30831
- http://secunia.com/advisories/31687
- http://www.mandriva.com/security/advisories?name=MDVSA-2008:140
- http://www.mandriva.com/security/advisories?name=MDVSA-2008:141
- http://www.ruby-lang.org/en/news/2008/06/20/arbitrary-code-execution-vulnerabilities/
- http://www.vupen.com/english/advisories/2008/1245/references
- https://exchange.xforce.ibmcloud.com/vulnerabilities/41824
- https://www.redhat.com/archives/fedora-package-announce/2008-June/msg00937.html
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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