Quake 2 unexpanded variable information disclosure

quake2-unexpanded-var-disclosure (9095) The risk level is classified as LowLow Risk

Description:

iid Software's Quake could reveal sensitive information. A malicious Quake client could send unexpanded variables to the server, which would be expanded in the local context, potentially revealing sensitive information to the attacker.


Consequences:

Obtain Information

Remedy:

Refer to the BugTraq Mailing List posting dated May 14 2002 2:48AM for information on obtaining unofficial patches. See References.

References:

  • BugTraq Mailing List, Mon May 13 2002 - 21:48:05 CDT: Remote quake 2 3.2x server cvar leak.
  • BID-4744: id Software Quake II Server Remote Information Disclosure Vulnerability
  • CVE-2002-0770: Quake 2 (Q2) server 3.20 and 3.21 allows remote attackers to obtain sensitive server cvar variables, obtain directory listings, and execute Q2 server admin commands via a client that does not expand $ macros, which causes the server to expand the macros and leak the information, as demonstrated using say $rcon_password.
  • OSVDB ID: 11187: Quake 2 Server Remote Client State Modification
  • OSVDB ID: 9850: Quake 2 Server $ Macro Arbitrary Command Execution
  • US-CERT VU#970915: Quake II Server performs console variable expansion on client-supplied input values

Platforms Affected:

  • id Software Quake 2 Server 3.20
  • id Software Quake 2 Server 3.21

Reported:

May 14, 2002

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