Vulnerability Description
The aufs module for the Linux kernel 3.x and 4.x does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory.
CVSS Score
7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.0.0, <= 3.19.8 |
Related Weaknesses (CWE)
References
- http://www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/ExploitThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/02/24/9ExploitMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/96838Third Party AdvisoryVDB Entry
- https://sourceforge.net/p/aufs/mailman/message/34864744/Third Party Advisory
- http://www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/ExploitThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/02/24/9ExploitMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/96838Third Party AdvisoryVDB Entry
- https://sourceforge.net/p/aufs/mailman/message/34864744/Third Party Advisory
FAQ
What is CVE-2016-2854?
CVE-2016-2854 is a vulnerability with a CVSS score of 7.8 (HIGH). The aufs module for the Linux kernel 3.x and 4.x does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory.
How severe is CVE-2016-2854?
CVE-2016-2854 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-2854?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.