The NFS client implementation in the kernel in Red Hat Enterprise Linux (RHEL) 3, when a filesystem is mounted with the noacl option, checks permissions for the open system call via vfs_permission (mode bits) data rather than an NFS ACCESS call to the server, which allows local client processes to obtain a false success status from open calls that the server would deny, and possibly obtain sensitive information about file permissions on the server, as demonstrated in a root_squash environment. NOTE: it is uncertain whether any scenarios involving this issue cross privilege boundaries.
2007-09-18T19:17:00.000
2025-04-09T00:30:58.490
Deferred
CVSSv2: 1.9 (LOW)
AV:L/AC:M/Au:N/C:P/I:N/A:N
3.4
2.9
Type | Vendor | Product | Version/Range | Vulnerable? |
---|---|---|---|---|
Operating System | redhat | enterprise_linux | 3.0 | Yes |