Security restrictions bypass in Linux kernel - CVE-2011-4127

Vulnerability details

The vulnerability allows a local user to read and manipulate data.

The Linux kernel before 3.2.2 does not properly restrict SG_IO ioctl calls, which allows local users to bypass intended restrictions on disk read and write operations by sending a SCSI command to (1) a partition block device or (2) an LVM volume.

Affected software

How to mitigate CVE-2011-4127

External References

• https://bugzilla.redhat.com/show_bug.cgi?id=752375
• https://github.com/torvalds/linux/commit/ec8013beddd717d1740cfefb1a9b900deef85462
• https://github.com/torvalds/linux/commit/0bfc96cb77224736dfa35c3c555d37b3646ef35e
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
• http://www.openwall.com/lists/oss-security/2011/12/22/5
• http://secunia.com/advisories/48898
• http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00020.html
• http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0bfc96cb77224736dfa35c3c555d37b3646ef35e
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ec8013beddd717d1740cfefb1a9b900deef85462

Related Security Bulletins

• Security restrictions bypass in Linux kernel
• Ubuntu update for linux