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

Bug#854421: systemd: "systemctl --user cat dirmngr.socket" produced garbage beyond # /dev/null



Control: reassign -1 src:linux 4.9.2-2
Control: close -1 4.9.6-3
Control: severity -1 serious
Control: tag -1 security

On Tue, 2017-02-07 at 11:14 -0500, Daniel Kahn Gillmor wrote:
> On Tue 2017-02-07 10:49:39 -0500, Daniel Kahn Gillmor wrote:
> >     git clone https://0xacab.org/dkg/debian-bug-854421
> >     cd debian-bug-854421
> >     make
> 
> interestingly, on at least one machine i try this on, getting it to
> reproduce is very infrequent with plain "make", even with the 20 tries
> on kernel version 4.9.2-2.

It's much less likely to happen if there's only one CPU.

> however, "make strace" seems to tickle the bug further, and makes it
> much more likely to reproduce on 4.9.2-2, even though it's only one
> try.
> 
> with kernel 4.9.6-3 i haven't been able to reproduce it with either
> "make" or "make strace".

This is CVE-2017-5550, fixed by:
https://git.kernel.org/linus/b9dc6f65bc5e232d1c05fe34b5daadc7e8bbf1fb

Ben.

-- 
Ben Hutchings
One of the nice things about standards is that there are so many of
them.

Attachment: signature.asc
Description: This is a digitally signed message part


Reply to: