High severity · published May 2, 2016
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…
7.8
CVSS
0.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 60% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
through 4.5.2 · source: NVD
UC
Ubuntu Core · Canonical
15.04 · source: NVD
UL
Ubuntu Linux · Canonical
12.04; 14.04; 15.10; 16.04; 16.10 · source: NVD
UT
Ubuntu Touch · Canonical
15.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-1575
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-1575
Patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360
Third Party Advisory
http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1575.html
Exploit
http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/
Mailing List
http://www.openwall.com/lists/oss-security/2016/02/24/7
Mailing List
http://www.openwall.com/lists/oss-security/2021/10/18/1
Third Party Advisory
https://launchpad.net/bugs/1534961
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