CVE-2016-2853
The aufs module for the Linux kernel 3.x and 4.x does not properly restrict the mount namespace, which allows local users to gain privileges by mounting an aufs filesystem on top of a FUSE filesystem, and then executing a crafted setuid program.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.91%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The aufs module for the Linux kernel 3.x and 4.x does not properly restrict the mount namespace, which allows local users to gain privileges by mounting an aufs filesystem on top of a FUSE filesystem, and then executing a crafted setuid program.
- 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
- 0.91% probability · 58th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-269
- Affected
- linux/linux kernel
- Source
- cve@mitre.org
References
- http://www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/Exploit, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/02/24/9Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/18/1Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/96839Broken Link
- https://sourceforge.net/p/aufs/mailman/message/34864744/Third Party Advisory
- http://www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/Exploit, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/02/24/9Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/18/1Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/96839Broken Link
- https://sourceforge.net/p/aufs/mailman/message/34864744/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.