[Samba] Great article on Samba symlink fixes at Linux Weekly News !

Jeremy Allison jra at samba.org
Sun Feb 13 22:05:31 UTC 2022

On Sun, Feb 13, 2022 at 01:00:17PM -0600, Patrick Goetz via samba wrote:
>I also don't quite understand the symlink vulnerability.
>  open("/my/super/important/stuff")
>The concern is that this creates a race condition where someone could
>  cd /my/super
>  ln -s /your/nefarious/location ./important
>where /your/nefarious/location/ includes a stuff/ directory before the 
>read or write is executed? How would this be possible given that 
>/my/super/ already includes an important/ directory?  Am I completely 
>missing how this works?

cd /my/super
mv ./important ./important-orig
ln -s /your/nefarious/location ./important

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