Re: [PATCH] Reset current->pdeath_signal on SUID binary execution

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi,

> the attached patch fixes a flaw in the "parent process death signal"
> when executing SUID binaries. An unprivileged user may send arbitrary
> signal to a child process even if it is running with higher privileges.
> 
> The idea to fix this issue is to reset pdeath_signal not only on fork,
> but also on the execution of a SUID binary.
> 
> Michael, if we fix it this way, then the prctl() manual page should
> reflect that behavior.

the patch has been merged into 2.4 and 2.6, so the manual page needs an
update at some point.

> From comments it seems that we have to also reset pdeath_signal inside
> LSM when it comes to capability-raised executes, but I must admit that I
> got lost there.

No further comments for this one? I am not familiar enough with it.

Regards

Marcel


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux