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Vulnerability Details : CVE-2014-5045

The mountpoint_last function in fs/namei.c in the Linux kernel before 3.15.8 does not properly maintain a certain reference count during attempts to use the umount system call in conjunction with a symlink, which allows local users to cause a denial of service (memory consumption or use-after-free) or possibly have unspecified other impact via the umount program.
Publish Date : 2014-08-01 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 Service
CWE ID 59

- Related OVAL Definitions

Title Definition Id Class Family
ELSA-2014-1392 -- kernel security, bug fix, and enhancement update (important) oval:org.mitre.oval:def:27024 unix
ELSA-2014-1971 -- kernel security and bug fix update (important) oval:org.mitre.oval:def:28418 unix
RHSA-2014:1392: kernel security, bug fix, and enhancement update (Important) oval:org.mitre.oval:def:27086 unix
RHSA-2014:1392: kernel security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20141392 unix
RHSA-2014:1971 -- kernel security and bug fix update (Important) oval:org.mitre.oval:def:28399 unix
RHSA-2014:1971: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20141971 unix
USN-2336-1 -- linux-lts-trusty vulnerabilities oval:org.mitre.oval:def:26633 unix
USN-2337-1 -- linux vulnerabilities oval:org.mitre.oval:def:26591 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-2014-5045

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel * * * * Version Details Vulnerabilities
2 OS Redhat Enterprise Linux Eus 6.5 * * * Version Details Vulnerabilities
3 OS Redhat Enterprise Linux Server Aus 6.5 * * * Version Details Vulnerabilities
4 OS Redhat Enterprise Linux Server Tus 6.5 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 1
Redhat Enterprise Linux Eus 1
Redhat Enterprise Linux Server Aus 1
Redhat Enterprise Linux Server Tus 1

- References For CVE-2014-5045

http://secunia.com/advisories/60353
SECUNIA 60353
http://rhn.redhat.com/errata/RHSA-2015-0062.html
REDHAT RHSA-2015:0062
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.8 CONFIRM
https://bugzilla.redhat.com/show_bug.cgi?id=1122472 CONFIRM
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=295dc39d941dc2ae53d5c170365af4c9d5c16212 CONFIRM
https://github.com/torvalds/linux/commit/295dc39d941dc2ae53d5c170365af4c9d5c16212 CONFIRM
http://www.openwall.com/lists/oss-security/2014/07/24/2
MLIST [oss-security] 20140723 Re: CVE request: kernel: vfs: refcount issues during unmount on symlink
http://www.securityfocus.com/bid/68862
BID 68862 Linux Kernel CVE-2014-5045 Local Privilege Escalation Vulnerability Release Date:2014-12-12

- Metasploit Modules Related To CVE-2014-5045

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


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