Messages in this thread | | | Subject | Re: [PATCH] Reset current->pdeath_signal on SUID binary execution | From | Marcel Holtmann <> | Date | Thu, 23 Aug 2007 10:21:11 +0200 |
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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
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