full-disclosure - AIX 4.3.3 has make sgid 0?

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Message-ID: <405FB8EF.5010803@zip.com.au>
From: dtucker at zip.com.au (Darren Tucker)
Subject: AIX 4.3.3 has make sgid 0?

BoneMachine wrote:
> I was browsing the SecurityFocus vulnerability database and found the following:
> http://www.securityfocus.com/bid/9903
> "Because the make utility is reported to run with setGID root privileges, a local attacker may potentially exploit this condition to gain access to the root group"
> 
> Is this true ? I cannot believe that IBM has an setGID root-bit on the make utillity. This goes against all security practices I've ever heard.
> Are there people that have more info on this vulnerability or is this a hoax?

make is *not* setgid on my AIX 4.3.3 ML 11 box:

# echo `uname` `oslevel -r`
AIX 4330-11
# ls -l /usr/ccs/bin/make
-r-xr-xr-x   1 bin    bin    90362 Sep 26 2002  /usr/ccs/bin/make
# lslpp -L bos.adt.base
bos.adt.base   4.3.3.78    C    Base Application Development Toolkit

Out of curiosity, I pulled apart the bos.adt fileset from the 4.3.3 
distribution media.  In the bos.adt.base.inventory file, make is 
specified as mode 555 and is not setgid there either:

/usr/ccs/bin/make:
           owner = bin
           group = bin
           mode = 555

I guess it's possible that one of the filesets between 4.3.3.0 and 
4.3.3.78 is different but I'm not about to find out...

-- 
Darren Tucker (dtucker at zip.com.au)
GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4  37C9 C982 80C7 8FF4 FA69
     Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.