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CVE
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CVE-2013-1858Date: (C)2013-04-06   (M)2023-12-22


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 and Metrics +CVSS Score and Metrics -

CVSS V2 Severity:
CVSS Score : 7.2
Exploit Score: 3.9
Impact Score: 10.0
 
CVSS V2 Metrics:
Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality: COMPLETE
Integrity: COMPLETE
Availability: COMPLETE
  
Reference:
http://www.openwall.com/lists/oss-security/2013/03/14/6
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
https://bugzilla.redhat.com/show_bug.cgi?id=921448
https://github.com/torvalds/linux/commit/e66eded8309ebf679d3d3c1f5820d1f2ca332c71

CWE    1
CWE-264

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