Upstream information

CVE-2016-1575 at MITRE

Description

The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory.

SUSE information

CVSS v2 Scores
  National Vulnerability Database
Base Score 7.15
Vector AV:L/AC:L/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
CVSS v3 Scores
  National Vulnerability Database
Base Score 7.8
Vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Access Vector Local
Access Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High

Note from the SUSE Security Team

This issue does not affect SUSE Linux Enterprise, as we have not enabled FS_USERNS_MOUNT in overlayfs.

SUSE Bugzilla entry: 968092 [RESOLVED / INVALID]

No SUSE Security Announcements cross referenced.