VulnerabilityModified

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.

HIGH 7.8EPSS 0.92%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.92%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

CVSS 3.1: 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.92% probability · 58th percentile
CISA KEV: Not listed
Weakness: CWE-269
Affected: linux/linux kernel · canonical/ubuntu core · canonical/ubuntu linux · canonical/ubuntu touch
Source: security@ubuntu.com

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360Patch, Vendor Advisory
http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1575.htmlThird Party Advisory
http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/Exploit, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/02/24/7Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/18/1Mailing List, Third Party Advisory
https://launchpad.net/bugs/1534961Third Party Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360Patch, Vendor Advisory
http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1575.htmlThird Party Advisory
http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/Exploit, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/02/24/7Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/18/1Mailing List, Third Party Advisory
https://launchpad.net/bugs/1534961Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.