Big Sam "safe_mode" option reveals Web root path information

bigsam-safemode-path-disclosure (8479) The risk level is classified as LowLow Risk

Description:

Built-In Guestbook Stand-Alone Module (Big Sam) could allow a remote attacker to obtain the real path of the Web root directory. If the safe_mode option is enabled, a remote attacker can send a specially-crafted HTTP request containing a large number in the $displayBegin variable in the bigsam_guestbook.php script to cause an error message to return that would contain the real path of the Web root directory.


Consequences:

Obtain Information

Remedy:

Upgrade to the latest version of Big Sam (1.1.09 or later), available from the Big Sam Web site. See References.

References:

  • Big Sam Web site: bigsam.
  • BugTraq Mailing List, Mon Mar 18 2002 - 17:31:23 CST: [ARL02-A11] Big Sam (Built-In Guestbook Stand-Alone Module) Multiple Vulnerabilities.
  • BID-4312: Big Sam Web Root Disclosure Vulnerability
  • CVE-2002-0462: bigsam_guestbook.php for Big Sam (Built-In Guestbook Stand-Alone Module) 1.1.08 and earlier allows remote attackers to cause a denial of service (CPU consumption) or obtain the absolute path of the web server via a displayBegin parameter with a very large number, which leaks the web path in an error message when PHP safe_mode is enabled, or consumes resources when safe_mode is not enabled.
  • OSVDB ID: 5287: Big Sam bigsam_guestbook.php Path Disclosure
  • OSVDB ID: 5288: Big Sam bigsam_guestbook.php DoS

Platforms Affected:

  • Georges Zadrozynski & Rémi Lecoupé-Grainville Big Sam prior to 1.1.09

Reported:

Mar 18, 2002

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