Vulnerability Description
The collect_mounts function in fs/namespace.c in the Linux kernel before 4.0.5 does not properly consider that it may execute after a path has been unmounted, which allows local users to cause a denial of service (system crash) by leveraging user-namespace root access for an MNT_DETACH umount2 system call.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 4.0.4 |
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cd4a40Vendor Advisory
- http://openwall.com/lists/oss-security/2015/05/29/10
- http://openwall.com/lists/oss-security/2015/05/29/5
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.5
- http://www.openwall.com/lists/oss-security/2015/06/04/5
- https://bugzilla.redhat.com/show_bug.cgi?id=1248486
- https://github.com/torvalds/linux/commit/cd4a40174b71acd021877341684d8bb1dc8ea4aVendor Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cd4a40Vendor Advisory
- http://openwall.com/lists/oss-security/2015/05/29/10
- http://openwall.com/lists/oss-security/2015/05/29/5
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.5
- http://www.openwall.com/lists/oss-security/2015/06/04/5
- https://bugzilla.redhat.com/show_bug.cgi?id=1248486
- https://github.com/torvalds/linux/commit/cd4a40174b71acd021877341684d8bb1dc8ea4aVendor Advisory
FAQ
What is CVE-2015-4177?
CVE-2015-4177 is a vulnerability with a CVSS score of 5.5 (MEDIUM). The collect_mounts function in fs/namespace.c in the Linux kernel before 4.0.5 does not properly consider that it may execute after a path has been unmounted, which allows local users to cause a denia...
How severe is CVE-2015-4177?
CVE-2015-4177 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2015-4177?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.