CVE-2013-1858

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.

Score

CVSS 2.0 7.2 High

Status

Modified - secalert@redhat.com

Published

2013-04-05

Last modified

2024-08-06

Weaknesses

CWE-264

Affected products

• Linux Kernel (Linux)

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=e66eded8309ebf679d3d3c1f5820d1f2ca332c71
• http://stealth.openwall.net/xSports/clown-newuser.c
• 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/e66eded8309ebf679d3d3c1f5820d1f2ca332c71