lkml.org 
[lkml]   [2007]   [Aug]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] Reset current->pdeath_signal on SUID binary execution
From
Date
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 majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-08-23 10:25    [W:0.152 / U:1.180 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site