CVE-2013-1957 Information

Description

The clone_mnt function in fs/namespace.c in the Linux kernel before 3.8.6 does not properly restrict changes to the MNT_READONLY flag which allows local users to bypass an intended read-only property of a filesystem by leveraging a separate mount namespace.

Reference

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=132c94e31b8bca8ea921f9f96a57d684fa4ae0a9 http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.6 http://www.openwall.com/lists/oss-security/2013/04/16/11 https://github.com/torvalds/linux/commit/132c94e31b8bca8ea921f9f96a57d684fa4ae0a9