Home/CVE/The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX ACL xattr data, which al
CVE

CVE-2016-1575

The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX ACL xattr data, which al

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.

HIGH · CVSS 7.8 EPSS 0.00525
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-269Improper Privilege Management
▤

Affected Products & Versions

4
linux kernel<= 4.5.2
canonical ubuntu coreall versions
canonical ubuntu linuxall versions
canonical ubuntu touchall versions
⚠

Public Exploits & PoCs

2
localUbuntu 14.04/15.10 - User Namespace Overlayfs Xattr SetGID Privilege Escalation2016-11-22
pocwww.halfdog.net · UserNamespaceOverlayfsXattrSetgidPrivilegeEscalationwww.halfdog.net
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · security@ubuntu.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD02 May 2016 · 10:59 AM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

7
usnUSN-2910-1
usnUSN-2909-1
usnUSN-2908-1
usnUSN-2908-2
usnUSN-2908-3
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360PatchVendor Advisory
http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1575.htmlThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/02/24/7Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/18/1Mailing ListThird Party Advisory
https://launchpad.net/bugs/1534961Third Party Advisory
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