CVE-2016-2854 Information

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 Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

http://www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/ http://www.openwall.com/lists/oss-security/2016/02/24/9 http://www.securityfocus.com/bid/96838 https://sourceforge.net/p/aufs/mailman/message/34864744/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8