National Cyber-Alert System
Vulnerability Summary for CVE-2008-1891
Original release date:04/18/2008
Last revised:11/15/2008
Source:
US-CERT/NIST
Overview
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.
Impact
CVSS Severity (version 2.0):
Impact Subscore:
2.9
Exploitability Subscore:
10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Allows unauthorized disclosure of information
- Official Statement from Red Hat (06/10/2009)
-
Red Hat is aware of this issue and is tracking it via the following bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=CVE-2008-1891
The risks associated with fixing this flaw outweigh the benefits of the fix. Red Hat does not plan to fix this flaw in Red Hat Enterprise Linux.
References to Advisories, Solutions, and Tools
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External Source: FEDORA
Name: FEDORA-2008-5649
External Source: XF
Name: ruby-webrick-cgi-info-disclosure(41824)
External Source: CONFIRM
Name: http://www.ruby-lang.org/en/news/2008/06/20/arbitrary-code-execution-vulnerabilities/
External Source: MANDRIVA
Name: MDVSA-2008:141
External Source: MANDRIVA
Name: MDVSA-2008:140
External Source: VUPEN
Name: ADV-2008-1245
Type: Advisory
External Source: SECUNIA
Name: 31687
External Source: SECUNIA
Name: 30831
External Source: SECUNIA
Name: 29794
Type: Advisory
External Source: SUSE
Name: SUSE-SR:2008:017
External Source: MISC
Name: http://aluigi.altervista.org/adv/webrickcgi-adv.txt