Description
OverlayFS in the Linux kernel before 3.0.0-16.28, as used in Ubuntu 10.0.4 LTS and 11.10, is missing inode security checks which could allow attackers to bypass security restrictions and perform unauthorized actions.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux kernel | OverlayFS | before 3.0.0-16.28, as used in Ubuntu 10.0.4 LTS and 11.10 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- OverlayFS inode Security Checks - 'inode.c' Local Security Bypass EDB-36571 · local · Jan 17, 2012 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- [oss-security] 20120117 Re: CVE Request: overlayfs mailing-list
- https://bugzilla.suse.com/show_bug.cgi?id=CVE-2012-0055
- https://access.redhat.com/security/cve/cve-2012-0055
- http://www.ubuntu.com/usn/USN-1363-1
- http://www.ubuntu.com/usn/USN-1364-1
- http://www.ubuntu.com/usn/USN-1384-1
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/915941