CVE-2014-9717

fs/namespace.c in the Linux kernel before 4.0.2 processes MNT_DETACH umount2 system calls without verifying that the MNT_LOCKED flag is unset, which allows local users to bypass intended access restrictions and navigate to filesystem locations beneath a mount by calling umount2 within a user namespace.

• CVE ID
• CVE-2014-9717

• Assigner
• cve@mitre.org

• Vulnerability Status
• Modified

• Published Version
• 2016-05-02T10:59:06

• Last Modified Date
• 2016-08-12T01:59:05

• Version
• 2.0

• Vector String
• AV:L/AC:L/Au:N/C:P/I:P/A:N

• Access Vector
• LOCAL

• Access Compatibility
• LOW

• Authentication
• NONE

• Confidentiality Impact
• PARTIAL

• Integrity Impact
• PARTIAL

• Availability Impact
• NONE

• Base Score
• 3.6

• Severity
• LOW

• Exploitability Score
• 3.9

• Impact Score
• 4.9

• Version
• 3.0

• Vector String
• CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

• Attack Vector
• LOCAL

• Attack Compatibility
• LOW

• Privileges Required
• LOW

• User Interaction
• NONE

• Scope
• UNCHANGED

• Confidentiality Impact
• LOW

• Availability Impact
• NONE

• Base Score
• 6.1

• Base Severity
• MEDIUM

• Exploitability Score
• 1.8

• Impact Score
• 4.2