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Vulnerability Details : CVE-2014-5207 (1 public exploit)

fs/namespace.c in the Linux kernel through 3.16.1 does not properly restrict clearing MNT_NODEV, MNT_NOSUID, and MNT_NOEXEC and changing MNT_ATIME_MASK during a remount of a bind mount, which allows local users to gain privileges, interfere with backups and auditing on systems that had atime enabled, or cause a denial of service (excessive filesystem updating) on systems that had atime disabled via a "mount -o remount" command within a user namespace.
Publish Date : 2014-08-18 Last Update Date : 2020-08-14
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- CVSS Scores & Vulnerability Types

CVSS Score
6.2
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity High (Specialized access conditions exist. It is hard to exploit and several special conditions must be satisfied to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of ServiceGain privileges
CWE ID 269

- Related OVAL Definitions

Title Definition Id Class Family
USN-2317-1 -- linux-lts-trusty vulnerabilities oval:org.mitre.oval:def:26533 unix
USN-2318-1 -- linux vulnerabilities oval:org.mitre.oval:def:26133 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2014-5207

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 12.04 * * * Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 14.04 * * * Version Details Vulnerabilities
3 OS Linux Linux Kernel * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 2
Linux Linux Kernel 1

- References For CVE-2014-5207

http://osvdb.org/show/osvdb/110055
OSVDB 110055
Exploit! http://www.exploit-db.com/exploits/34923
EXPLOIT-DB 34923 Linux Kernel 3.16.1 - Remount FUSE Exploit Author:Andy Lutomirski Release Date:2014-10-09 (linux) local
http://www.openwall.com/lists/oss-security/2014/08/13/4
MLIST [oss-security] 20140813 Re: CVE Request: ro bind mount bypass using user namespaces
http://seclists.org/oss-sec/2014/q3/352
MLIST [oss-security] 20140812 CVE Request: ro bind mount bypass using user namespaces
http://www.securityfocus.com/bid/69216
BID 69216 Linux Kernel CVE-2014-5207 Local Security Bypass Vulnerability Release Date:2014-12-24
http://www.ubuntu.com/usn/USN-2318-1
UBUNTU USN-2318-1
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9566d6742852c527bf5af38af5cbb878dad75705 CONFIRM
http://www.ubuntu.com/usn/USN-2317-1
UBUNTU USN-2317-1
https://bugzilla.redhat.com/show_bug.cgi?id=1129662 CONFIRM
https://github.com/torvalds/linux/commit/9566d6742852c527bf5af38af5cbb878dad75705 CONFIRM
http://packetstormsecurity.com/files/128595/Linux-Kernel-3.16.1-FUSE-Privilege-Escalation.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/95266
XF linux-kernel-cve20145207-sec-bypass(95266)

- Metasploit Modules Related To CVE-2014-5207

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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