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.

Weakness

The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

Affected Software

Potential Mitigations

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/122.html
• https://cwe.mitre.org/data/definitions/233.html
• https://cwe.mitre.org/data/definitions/58.html

References

• http://www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/
• http://www.openwall.com/lists/oss-security/2016/02/24/9
• http://www.openwall.com/lists/oss-security/2021/10/18/1
• http://www.securityfocus.com/bid/96839
• https://sourceforge.net/p/aufs/mailman/message/34864744/
• http://www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/
• http://www.openwall.com/lists/oss-security/2016/02/24/9
• http://www.openwall.com/lists/oss-security/2021/10/18/1
• http://www.securityfocus.com/bid/96839
• https://sourceforge.net/p/aufs/mailman/message/34864744/