ID CVE-2008-1145
Summary Directory traversal vulnerability in WEBrick in Ruby 1.8 before 1.8.5-p115 and 1.8.6-p114, and 1.9 through 1.9.0-1, when running on systems that support backslash (\) path separators or case-insensitive file names, allows remote attackers to access arbitrary files via (1) "..%5c" (encoded backslash) sequences or (2) filenames that match patterns in the :NondisclosureName option.
References
Vulnerable Configurations
  • cpe:2.3:a:webrick:webrick:*:*:*:*:*:*:*:*
    cpe:2.3:a:webrick:webrick:*:*:*:*:*:*:*:*
CVSS
Base: 5.0 (as of 11-10-2018 - 20:29)
Impact:
Exploitability:
CWE CWE-22
CAPEC
  • Manipulating Web Input to File System Calls
    An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
  • Using Slashes and URL Encoding Combined to Bypass Validation Logic
    This attack targets the encoding of the URL combined with the encoding of the slash characters. An attacker can take advantage of the multiple ways of encoding a URL and abuse the interpretation of the URL. A URL may contain special character that need special syntax handling in order to be interpreted. Special characters are represented using a percentage character followed by two digits representing the octet code of the original character (%HEX-CODE). For instance US-ASCII space character would be represented with %20. This is often referred as escaped ending or percent-encoding. Since the server decodes the URL from the requests, it may restrict the access to some URL paths by validating and filtering out the URL requests it received. An attacker will try to craft an URL with a sequence of special characters which once interpreted by the server will be equivalent to a forbidden URL. It can be difficult to protect against this attack since the URL can contain other format of encoding such as UTF-8 encoding, Unicode-encoding, etc.
  • Using Escaped Slashes in Alternate Encoding
    This attack targets the use of the backslash in alternate encoding. An attacker can provide a backslash as a leading character and causes a parser to believe that the next character is special. This is called an escape. By using that trick, the attacker tries to exploit alternate ways to encode the same character which leads to filter problems and opens avenues to attack.
  • Path Traversal
    An adversary uses path manipulation methods to exploit insufficient input validation of a target to obtain access to data that should be not be retrievable by ordinary well-formed requests. A typical variety of this attack involves specifying a path to a desired file together with dot-dot-slash characters, resulting in the file access API or function traversing out of the intended directory structure and into the root file system. By replacing or modifying the expected path information the access function or API retrieves the file desired by the attacker. These attacks either involve the attacker providing a complete path to a targeted file or using control characters (e.g. path separators (/ or \) and/or dots (.)) to reach desired directories or files.
  • Using Slashes in Alternate Encoding
    This attack targets the encoding of the Slash characters. An attacker would try to exploit common filtering problems related to the use of the slashes characters to gain access to resources on the target host. Directory-driven systems, such as file systems and databases, typically use the slash character to indicate traversal between directories or other container components. For murky historical reasons, PCs (and, as a result, Microsoft OSs) choose to use a backslash, whereas the UNIX world typically makes use of the forward slash. The schizophrenic result is that many MS-based systems are required to understand both forms of the slash. This gives the attacker many opportunities to discover and abuse a number of common filtering problems. The goal of this pattern is to discover server software that only applies filters to one version, but not the other.
Access
VectorComplexityAuthentication
NETWORK LOW NONE
Impact
ConfidentialityIntegrityAvailability
PARTIAL NONE NONE
cvss-vector via4 AV:N/AC:L/Au:N/C:P/I:N/A:N
oval via4
accepted 2013-04-29T04:10:05.893-04:00
class vulnerability
contributors
  • name Aharon Chernin
    organization SCAP.com, LLC
  • name Dragos Prisaca
    organization G2, Inc.
definition_extensions
  • comment The operating system installed on the system is Red Hat Enterprise Linux 4
    oval oval:org.mitre.oval:def:11831
  • comment CentOS Linux 4.x
    oval oval:org.mitre.oval:def:16636
  • comment Oracle Linux 4.x
    oval oval:org.mitre.oval:def:15990
  • comment The operating system installed on the system is Red Hat Enterprise Linux 5
    oval oval:org.mitre.oval:def:11414
  • comment The operating system installed on the system is CentOS Linux 5.x
    oval oval:org.mitre.oval:def:15802
  • comment Oracle Linux 5.x
    oval oval:org.mitre.oval:def:15459
description Directory traversal vulnerability in WEBrick in Ruby 1.8 before 1.8.5-p115 and 1.8.6-p114, and 1.9 through 1.9.0-1, when running on systems that support backslash (\) path separators or case-insensitive file names, allows remote attackers to access arbitrary files via (1) "..%5c" (encoded backslash) sequences or (2) filenames that match patterns in the :NondisclosureName option.
family unix
id oval:org.mitre.oval:def:10937
status accepted
submitted 2010-07-09T03:56:16-04:00
title Directory traversal vulnerability in WEBrick in Ruby 1.8 before 1.8.5-p115 and 1.8.6-p114, and 1.9 through 1.9.0-1, when running on systems that support backslash (\) path separators or case-insensitive file names, allows remote attackers to access arbitrary files via (1) "..%5c" (encoded backslash) sequences or (2) filenames that match patterns in the :NondisclosureName option.
version 30
redhat via4
advisories
rhsa
id RHSA-2008:0897
rpms
  • irb-0:1.8.1-7.el4_7.1
  • ruby-0:1.8.1-7.el4_7.1
  • ruby-0:1.8.5-5.el5_2.5
  • ruby-debuginfo-0:1.8.1-7.el4_7.1
  • ruby-debuginfo-0:1.8.5-5.el5_2.5
  • ruby-devel-0:1.8.1-7.el4_7.1
  • ruby-devel-0:1.8.5-5.el5_2.5
  • ruby-docs-0:1.8.1-7.el4_7.1
  • ruby-docs-0:1.8.5-5.el5_2.5
  • ruby-irb-0:1.8.5-5.el5_2.5
  • ruby-libs-0:1.8.1-7.el4_7.1
  • ruby-libs-0:1.8.5-5.el5_2.5
  • ruby-mode-0:1.8.1-7.el4_7.1
  • ruby-mode-0:1.8.5-5.el5_2.5
  • ruby-rdoc-0:1.8.5-5.el5_2.5
  • ruby-ri-0:1.8.5-5.el5_2.5
  • ruby-tcltk-0:1.8.1-7.el4_7.1
  • ruby-tcltk-0:1.8.5-5.el5_2.5
refmap via4
apple APPLE-SA-2008-06-30
bid 28123
bugtraq
  • 20080306 Re: [DSECRG-08-018] Ruby 1.8.6 (Webrick Httpd 1.3.1) Directory traversal file Download Vulnerability
  • 20080306 [DSECRG-08-018] Ruby 1.8.6 (Webrick Httpd 1.3.1) Directory traversal file Download Vulnerability
  • 20080325 rPSA-2008-0123-1 ruby
cert-vn VU#404515
confirm
exploit-db 5215
fedora
  • FEDORA-2008-2443
  • FEDORA-2008-2458
mandriva
  • MDVSA-2008:141
  • MDVSA-2008:142
sectrack 1019562
secunia
  • 29232
  • 29357
  • 29536
  • 30802
  • 31687
  • 32371
suse SUSE-SR:2008:017
vupen
  • ADV-2008-0787
  • ADV-2008-1981
xf ruby-webrick-directory-traversal(41010)
statements via4
contributor Mark J Cox
lastmodified 2008-12-04
organization Red Hat
statement This issue was addressed in affected versions of Ruby as shipped in Red Hat Enterprise Linux 4 and 5 via: https://rhn.redhat.com/errata/RHSA-2008-0897.html
Last major update 11-10-2018 - 20:29
Published 04-03-2008 - 23:44
Last modified 11-10-2018 - 20:29
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