Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 3.15.8 |
| Redhat | Enterprise Linux Eus | 6.5 |
| Redhat | Enterprise Linux Server Aus | 6.5 |
| Redhat | Enterprise Linux Server Tus | 6.5 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://rhn.redhat.com/errata/RHSA-2015-0062.htmlThird Party Advisory
- http://secunia.com/advisories/60353Third Party Advisory
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.8PatchThird Party AdvisoryVendor Advisory
- http://www.openwall.com/lists/oss-security/2014/07/24/2Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/68862Third Party AdvisoryVDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1122472Issue TrackingThird Party Advisory
- https://github.com/torvalds/linux/commit/295dc39d941dc2ae53d5c170365af4c9d5c1621ExploitPatchThird Party Advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://rhn.redhat.com/errata/RHSA-2015-0062.htmlThird Party Advisory
- http://secunia.com/advisories/60353Third Party Advisory
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.8PatchThird Party AdvisoryVendor Advisory
- http://www.openwall.com/lists/oss-security/2014/07/24/2Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/68862Third Party AdvisoryVDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1122472Issue TrackingThird Party Advisory
FAQ
What is CVE-2014-5045?
CVE-2014-5045 is a vulnerability with a CVSS score of 6.2 (MEDIUM). 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 sy...
How severe is CVE-2014-5045?
CVE-2014-5045 has been rated MEDIUM with a CVSS base score of 6.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2014-5045?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Redhat Enterprise Linux Eus, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Tus.