Vulnerability Description
The clone system-call implementation in the Linux kernel before 3.8.3 does not properly handle a combination of the CLONE_NEWUSER and CLONE_FS flags, which allows local users to gain privileges by calling chroot and leveraging the sharing of the / directory between a parent process and a child process.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 3.8.2 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://stealth.openwall.net/xSports/clown-newuser.cExploit
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.3
- http://www.openwall.com/lists/oss-security/2013/03/14/6
- https://bugzilla.redhat.com/show_bug.cgi?id=921448
- https://github.com/torvalds/linux/commit/e66eded8309ebf679d3d3c1f5820d1f2ca332c7
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://stealth.openwall.net/xSports/clown-newuser.cExploit
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.3
- http://www.openwall.com/lists/oss-security/2013/03/14/6
- https://bugzilla.redhat.com/show_bug.cgi?id=921448
- https://github.com/torvalds/linux/commit/e66eded8309ebf679d3d3c1f5820d1f2ca332c7
FAQ
What is CVE-2013-1858?
CVE-2013-1858 is a vulnerability with a CVSS score of 7.2 (HIGH). The clone system-call implementation in the Linux kernel before 3.8.3 does not properly handle a combination of the CLONE_NEWUSER and CLONE_FS flags, which allows local users to gain privileges by cal...
How severe is CVE-2013-1858?
CVE-2013-1858 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2013-1858?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.