Re: 2.4.16 + strace 4.4 + setuid programs

[Damian M Gryski <dgryski@uwaterloo.ca>]

On Thu, 06 Dec 2001, Keith Warno wrote:
> Hmm.  Is strace supposed to be capable of tracing setuid programs (ie,
> su) when executed by mortal users?  I always thought this was a big
> no-no.

   Seems to me it drops permissions instead of not allowing the trace.

--- 8< --- cut here --- 8< ---
dmg@jolt:[pts/4]:~$ cat euid.c
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>

int main() { printf("euid=%d\n", geteuid()); }

dmg@jolt:[pts/4]:~$ ls -l ./euid
-rwsr-sr-x    1 root     root         5039 Dec  6 01:46 ./euid
dmg@jolt:[pts/4]:~$ ./euid
euid=0
dmg@jolt:[pts/4]:~$ strace -o /dev/null ./euid
euid=1000
dmg@jolt:[pts/4]:~$
--- 8< --- cut here --- 8< ---

   Damian

-- 
Damian Gryski ==> dgryski@uwaterloo.ca | Linux, the choice of a GNU generation
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