Published: 01/04/2022 Updated: 11/04/2022

CVSS v2 Base Score: 7.2 | Impact Score: 10 | Exploitability Score: 3.9

CVSS v3 Base Score: 7.8 | Impact Score: 5.9 | Exploitability Score: 1.8

VMScore: 641

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

An unauthorized access to the execution of the setuid file with capabilities flaw in the Linux kernel OverlayFS subsystem was found in the way user copying a capable file from a nosuid mount into another mount. A local user could use this flaw to escalate their privileges on the system.

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fedoraproject fedora 34

An unauthorized access to the execution of the setuid file with capabilities flaw in the Linux kernel OverlayFS subsystem was found in the way user copying a capable file from a nosuid mount into another mount A local user could use this flaw to escalate their privileges on the system ...

A security issue has been found in the Linux kernel An attacker with a low-privileged user on a Linux machine with an overlay mount which has a file capability in one of its layers may escalate his privileges up to root when copying a capable file from a nosuid mount into another mount ...

oss-sec mailing list archives   By Date By Thread </form>    Re: CVE-2021-3847: OverlayFS - Potential Privilege Escalation using overlays copy_up  <!--X-Head-of ...

CWE-281 https://www.openwall.com/lists/oss-security/2021/10/14/3 https://bugzilla.redhat.com/show_bug.cgi?id=2009704 https://nvd.nist.gov https://access.redhat.com/security/cve/cve-2021-3847

CVE-2021-3847

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