VulnerabilityModified
CVE-2016-2854
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.
HIGH 7.8EPSS 0.95%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.95%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.95% probability · 59th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-269
- Affected
- linux/linux kernel
- Source
- cve@mitre.org
References
- http://www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/Exploit, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/02/24/9Exploit, Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/96838Third Party Advisory, VDB Entry
- https://sourceforge.net/p/aufs/mailman/message/34864744/Third Party Advisory
- http://www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/Exploit, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/02/24/9Exploit, Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/96838Third Party Advisory, VDB Entry
- https://sourceforge.net/p/aufs/mailman/message/34864744/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.