Permissions, Privileges, and Access Controls in Linux kernel - CVE-2011-1833

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

Race condition in the ecryptfs_mount function in fs/ecryptfs/main.c in the eCryptfs subsystem in the Linux kernel before 3.1 allows local users to bypass intended file permissions via a mount.ecryptfs_private mount with a mismatched uid.

Affected software

How to mitigate CVE-2011-1833

External References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=764355487ea220fdc2faf128d577d7f679b91f97
• http://lists.opensuse.org/opensuse-security-announce/2011-08/msg00009.html
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1
• http://www.ubuntu.com/usn/USN-1188-1
• https://bugzilla.redhat.com/show_bug.cgi?id=731172
• https://github.com/torvalds/linux/commit/764355487ea220fdc2faf128d577d7f679b91f97

Related Security Bulletins

• Permissions, Privileges, and Access Controls in Linux kernel
• Amazon Linux AMI update for kernel