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[email protected]NVD:CVE-2021-3492

HistoryApr 17, 2021 - 5:15 a.m.

CVE-2021-3492

2021-04-1705:15:13

CWE-415

CWE-401

[email protected]

web.nvd.nist.gov

shiftfs

ubuntu

memory handling

vulnerability

denial of service

privilege escalation

CVSS2

7.2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.001

Percentile

17.9%

JSON

Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux kernels, did not properly handle faults occurring during copy_from_user() correctly. These could lead to either a double-free situation or memory not being freed at all. An attacker could use this to cause a denial of service (kernel memory exhaustion) or gain privileges via executing arbitrary code. AKA ZDI-CAN-13562.

Affected configurations

Nvd

Node

canonicalubuntu_linuxRange<18.04lts

canonicalubuntu_linuxRange18.04.1–20.04lts

Node

canonicalubuntu_linuxRange<20.10-

VendorProductVersionCPE
canonicalubuntu_linux*cpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:lts:*:*:*
canonicalubuntu_linux*cpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:-:*:*:*