Vulnerability Description
The create_user_ns function in kernel/user_namespace.c in the Linux kernel before 3.8.6 does not check whether a chroot directory exists that differs from the namespace root directory, which allows local users to bypass intended filesystem restrictions via a crafted clone system call.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 3.8.5 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.6
- http://www.openwall.com/lists/oss-security/2013/04/16/11
- https://github.com/torvalds/linux/commit/3151527ee007b73a0ebd296010f1c0454a919c7
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.6
- http://www.openwall.com/lists/oss-security/2013/04/16/11
- https://github.com/torvalds/linux/commit/3151527ee007b73a0ebd296010f1c0454a919c7
FAQ
What is CVE-2013-1956?
CVE-2013-1956 is a vulnerability with a CVSS score of 2.1 (LOW). The create_user_ns function in kernel/user_namespace.c in the Linux kernel before 3.8.6 does not check whether a chroot directory exists that differs from the namespace root directory, which allows lo...
How severe is CVE-2013-1956?
CVE-2013-1956 has been rated LOW with a CVSS base score of 2.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2013-1956?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.