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

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/

Follow-Ups:
- Re: [PATCH] Reset current->pdeath_signal on SUID binary execution
  - From: Michael Kerrisk <[email protected]>

References:
- [PATCH] Reset current->pdeath_signal on SUID binary execution
  - From: Marcel Holtmann <[email protected]>

Prev by Date: request for Linux kernel related project ideas
Next by Date: Re: [PATCH] Corrections in Documentation/block/ioprio.txt
Previous by thread: [PATCH] Reset current->pdeath_signal on SUID binary execution
Next by thread: Re: [PATCH] Reset current->pdeath_signal on SUID binary execution
Index(es):
- Date
- Thread

[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]