First published: Tue May 12 2009(Updated: )
Description of problem: Frank Filz reported: the problem is that permission checking is skipped if atomic open is possible, but when exec opens a file, it just opens it O_READONLY which means EXEC permission will not be checked at that time. This problem is observed by the following sequence (executed as root): mount -t nfs4 server:/ /mnt4 echo "ls" >/mnt4/foo chmod 744 /mnt4/foo su guest -c "mnt4/foo" Reference: <a href="http://article.gmane.org/gmane.linux.nfs/26592">http://article.gmane.org/gmane.linux.nfs/26592</a>
Credit: cve@mitre.org
Affected Software | Affected Version | How to fix |
---|---|---|
Linux Kernel | <=2.6.29.3 | |
openSUSE | =11.0 | |
openSUSE | =11.1 | |
Debian Debian Linux | =4.0 | |
Debian Debian Linux | =5.0 | |
Ubuntu Linux | =6.06 | |
Ubuntu Linux | =8.04 | |
Ubuntu Linux | =8.10 | |
Ubuntu Linux | =9.04 | |
VMware ESX | =2.5.5 | |
VMware ESX | =3.0.3 | |
VMware ESX | =3.5 | |
VMware ESX | =4.0 |
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