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Date: Mon, 29 Mar 2010 12:53:59 +0200
From: Jan Lieskovsky <>
To: "Steven M. Christey" <>
CC: oss-security <>,
        Richard Stanway <>
Subject: CVE Request -- Quake II Server -- two security issues affecting also
 Alien Arena

Hi Steve, vendors,

   (based on [1]

Richard Stanway posted on QuakeDev Forums page:

two new vulnerabilities affecting also code, as present
in Alien Arena (from [2]):

   A, "Multiple auto downloading DoS conditions:
       By supplying various invalid parameters to the download command,
       it is possible to cause a DoS condition by causing the server to
       crash. A path ending in . or / will crash on Linux. Supplying
       a negative offset will cause a crash on all platforms."

   Proposed patch:

   Public PoC ([4]
     cmd download maps/tca-zion.bsp -123456789

   CVSSv2 Score: 4.0/AV:N/AC:L/Au:S/C:N/I:N/A:P

   B, "Server-side cvar expansion:
       By passing an unexpanded string containing $macros to the
       server, the server will expand it using it's cvars. This can
       be used to leak sensitive information such as the rcon_password cvar."

   Proposed patch: N/A

   Richard, is there a patch for this issue yet?

   Public PoC: [5]
   At the client console: "say $rcon_password"

   CVSSv2 Score: 4.0/ AV:N/AC:L/Au:S/C:P/I:N/A:N

Regarding the B, issue -- not completely sure alienarena-server supports "server-side cvar expansion"
(but assuming so). Richard, could you please clarify this?

Steve, could you allocate the CVE ids for these two issues? (once issue B, confirmed).

Thanks && Regards, Jan.
Jan iankko Lieskovsky / Red Hat Security Response Team

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