Vulnerability Monitor

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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.

Published

2016-05-02T10:59:23.237

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

CVSSv2 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

Exploitability Score

3.9

Impact Score

10.0

Weaknesses

Type: Primary
CWE-269

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	linux	linux_kernel	≤ 4.5.2	Yes
Operating System	canonical	ubuntu_core	15.04	Yes
Operating System	canonical	ubuntu_linux	12.04	Yes
Operating System	canonical	ubuntu_linux	14.04	Yes
Operating System	canonical	ubuntu_linux	15.10	Yes
Operating System	canonical	ubuntu_linux	16.04	Yes
Operating System	canonical	ubuntu_linux	16.10	Yes
Operating System	canonical	ubuntu_touch	15.04	Yes

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360 Patch, Vendor Advisory ([email protected])
http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1575.html Third Party Advisory ([email protected])
http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/ Exploit, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2016/02/24/7 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2021/10/18/1 Mailing List, Third Party Advisory ([email protected])
https://launchpad.net/bugs/1534961 Third Party Advisory ([email protected])
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360 Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1575.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/ Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2016/02/24/7 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2021/10/18/1 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://launchpad.net/bugs/1534961 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)