phpBB GET/POST/COOKIE and GLOBALS could be used to bypass security

phpbb-globals-bypass-security (22914) The risk level is classified as MediumMedium Risk

Description:

phpBB could allow a remote attacker to bypass security mechanisms. A remote attacker could set the GET/POST/COOKIE(GPC) and the GLOBALS variable to the same value, which would cause the GLOBALS variable to be reset, allowing the attacker to bypass security mechanisms.

Platforms Affected:

  • Debian, Debian Linux 3.1
  • phpBB, phpBB 2.0.17 and prior

Remedy:

Upgrade to the latest version of phpBB (2.0.18 or later), available from the phpBB Web site. See References.

Consequences:

Bypass Security

References:

  • Full-Disclosure Mailing List, Sun Oct 30 2005 - 18:16:37 CST, Advisory 17/2005: phpBB Multiple Vulnerabilities at http://archives.neohapsis.com/archives/fulldisclosure/2005-10/0637.html.
  • phpBB Web site, phpBB:: Creating Communities at http://www.phpbb.com/.
  • BID-15243: PHPBB Global Variable Deregistration Bypass Vulnerabilities
  • CVE-2005-3415: phpBB 2.0.17 and earlier allows remote attackers to bypass protection mechanisms that deregister global variables by setting both a GET/POST/COOKIE (GPC) variable and a GLOBALS[] variable with the same name, which causes phpBB to unset the GLOBALS[] variable but not the GPC variable.
  • DSA-925: phpbb2 -- several vulnerabilities
  • OSVDB ID: 20386: phpBB GPC Variable Set register_globals Bypass
  • SA17366: phpBB Multiple Vulnerabilities
  • SECTRACK ID: 1015121: phpBB Lets Remote Users Bypass the Global `Deregistration` Code, Inject SQL Commands, Execute PHP Code, and Conduct Cross-Site Scripting Attacks

Reported:

Oct 31, 2005

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