Ruby WEBrick CGI information disclosure
| ruby-webrick-cgi-info-disclosure (41824) |  Low Risk |
Description:
Ruby could allow a remote attacker to obtain sensitive information, caused by an error in the WEBrick class when used with certain filesystems. By sending a specially-crafted URL request appended with certain encoded characters, an attacker could bypass CGI execution to download the affected file.
*CVSS:
| Base Score: | 5 |
| Access Vector: | Network |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | Partial |
| Integrity Impact: | None |
| Availability Impact: | None |
| Temporal Score: | 3.7 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Obtain Information
Remedy:
Refer to Ruby Programming Language Web site for patch, upgrade or suggested workaround information. See References.
References:
- Luigi Auriemma Advisories, 15 Apr 2008: CGI source disclosure in WEBrick.
- Ruby Programming Language Web site: Ruby Programming Language.
- 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.
- MDVSA-2008:140: Updated ruby packages fix vulnerabilities
- MDVSA-2008:141: Updated ruby packages fix vulnerabilities
- SA29794: Ruby WEBrick Information Disclosure
- SUSE-SR:2008:017: SUSE Security Summary Report
- VUPEN/ADV-2008-1245: Ruby WEBrick Library Remote Information Disclosure Vulnerabilities
Platforms Affected:
- MandrakeSoft Mandrake Linux 2007.1 X86_64
- MandrakeSoft Mandrake Linux 2007.1
- MandrakeSoft Mandrake Linux 2008.0
- MandrakeSoft Mandrake Linux 2008.0 X86_64
- MandrakeSoft Mandrake Linux 2008.1 X86_64
- MandrakeSoft Mandrake Linux 2008.1
- MandrakeSoft Mandrake Linux Corporate Server 4.0
- MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
- Yukihiro Matsumoto Ruby 1.9.0 and prior
Reported:
Apr 15, 2008
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.