The Linux kernel 22.214.171.124 and earlier, when a ReiserFS filesystem
exists, does not restrict read or write access to the .reiserfs_priv
directory, which allows local users to gain privileges by modifying
(1) extended attributes or (2) ACLs, as demonstrated by deleting a
file under .reiserfs_priv/xattrs/.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MLIST:[linux-kernel] 20100408 [PATCH #3] reiserfs: Fix permissions on .reiserfs_priv
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