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CVE-2013-1858

Good to know:

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Date: April 5, 2013

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.

Language: C

Severity Score

Related Resources (8)

http://stealth.openwall.net/xSports/clown-newuser.c
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.3
https://nvd.nist.gov/vuln/detail/CVE-2013-1858
https://github.com/torvalds/linux/commit/e66eded8309ebf679d3d3c1f5820d1f2ca332c71
https://bugzilla.redhat.com/show_bug.cgi?id=921448
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=e66eded8309ebf679d3d3c1f5820d1f2ca332c71
http://www.openwall.com/lists/oss-security/2013/03/14/6
https://www.mend.io/vulnerability-database/CVE-2013-1858

Severity Score

Weakness Type (CWE)

Permissions, Privileges, and Access Control

CWE-264

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): COMPLETE
Integrity (I): COMPLETE
Availability (A): COMPLETE
Additional information:

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