Vulnerability Report

CVE-2016-1575

Title: Canonical Ubuntu Touch Auth Bypass

Auth Bypass

Proof Of Concept

PoC Available for CVE-2016-1575

CWE Category CWE-269
Published Date May 02, 2016
Modified Date Jun 17, 2026
Exploit Status Available
Score 7.8 CVSS v3.1
Exploit Probability (EPSS)
0.92%

Vulnerability Summary

CVE-2016-1575: 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.

Impacted Vendors

U
ubuntu 2
C
canonical 3
U
ubports 1
L
linux 1

Reference Links

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360 http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1575.html http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/ http://www.openwall.com/lists/oss-security/2016/02/24/7 http://www.openwall.com/lists/oss-security/2021/10/18/1 https://launchpad.net/bugs/1534961 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360 http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1575.html http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/ http://www.openwall.com/lists/oss-security/2016/02/24/7 http://www.openwall.com/lists/oss-security/2021/10/18/1 https://launchpad.net/bugs/1534961
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.8
Attack Vector
LOCAL
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0
Source Entity [email protected]
Severity HIGH
7.2
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:L/AC:L/Au:N/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2016-1575 Exploits & PoCs (Proof Of Concept)

Exploit-DB https://www.exploit-db.com/exploits/41762
View Code
MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector LOCAL
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.