[NBLUG/talk] [Fwd: Re: Mandrake 9.0 local root exploit]

[ME]

Any Mandrake users out there on multi user systems?


---------------------------- Original Message ----------------------------
Subject: Re: Mandrake 9.0 local root exploit
From:    "KF" <dotslash at snosoft.com>
Date:    Thu, February 27, 2003 2:09 pm
To:      bugtraq at securityfocus.com
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A portion of this exploit scenario has already been disclosed in the 
past. The tmp file issues in ml85p can be located at
http://www.securityfocus.com/bid/3008

Mandrake has released an advisory (MDKSA-2003:010) which contains fixes:

The information contained below is the snippet from the iDEFENSE
advisory http://www.idefense.com/advisory/01.21.03.txt. This condition 
has also already been exploited by SNOSoft with the help of Charles 
Stevenson:

  VULNERABILITY THREE: The ml85p binary, installed set user id root,
contains a race condition in its opening of temporary files. Successful
exploitation provides an attacker with the ability to create or empty a
file with super user privileges. The following snippet contains the
offending segment of code:

  sprintf(gname,"/tmp/mlg85p%d",time(0));
       if (!(cbmf = fopen(gname,"w+"))) {

-KF