Thread (5 messages) flat view 5 messages, 5 authors, 2019-09-09

Re: [PATCH v2 0/5] Add support for O_MAYEXEC

From: Florian Weimer <hidden>
Date: 2019-09-06 18:57:15
Also in: linux-api, linux-fsdevel, lkml

* Steve Grubb:
Now with LD_AUDIT
$ LD_AUDIT=/home/sgrubb/test/openflags/strip-flags.so.0 strace ./test 2>&1 | grep passwd
openat(3, "passwd", O_RDONLY)           = 4

No O_CLOEXEC flag.
I think you need to explain in detail why you consider this a problem.

With LD_PRELOAD and LD_AUDIT, you can already do anything, including
scanning other loaded objects for a system call instruction and jumping
to that (in case a security module in the kernel performs a PC check to
confer additional privileges).

Thanks,
Florian
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