CVE-2021-3732

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-3732
A flaw was found in the Linux kernel's OverlayFS subsystem in the way the user mounts the TmpFS filesystem with OverlayFS. This flaw allows a local user to gain access to hidden files that should not be accessible.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

2.1 /10

CVSS v2.0 : LOW

V2 Legend

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

Exploitability : 3.9 / Impact : 2.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References
Link Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1995249 Issue Tracking Patch Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=427215d85e8d1476da1a86b8d67aceb485eb3631 Mailing List Patch Vendor Advisory
https://github.com/torvalds/linux/commit/427215d85e8d1476da1a86b8d67aceb485eb3631 Patch Third Party Advisory
https://ubuntu.com/security/CVE-2021-3732 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1995249 Issue Tracking Patch Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=427215d85e8d1476da1a86b8d67aceb485eb3631 Mailing List Patch Vendor Advisory
https://github.com/torvalds/linux/commit/427215d85e8d1476da1a86b8d67aceb485eb3631 Patch Third Party Advisory
https://ubuntu.com/security/CVE-2021-3732 Third Party Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.14:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.14:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.14:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.14:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.14:rc5:*:*:*:*:*:*
History

21 Nov 2024, 06:22

Type Values Removed Values Added
References () https://bugzilla.redhat.com/show_bug.cgi?id=1995249 - Issue Tracking, Patch, Third Party Advisory () https://bugzilla.redhat.com/show_bug.cgi?id=1995249 - Issue Tracking, Patch, Third Party Advisory
References () https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=427215d85e8d1476da1a86b8d67aceb485eb3631 - Mailing List, Patch, Vendor Advisory () https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=427215d85e8d1476da1a86b8d67aceb485eb3631 - Mailing List, Patch, Vendor Advisory
References () https://github.com/torvalds/linux/commit/427215d85e8d1476da1a86b8d67aceb485eb3631 - Patch, Third Party Advisory () https://github.com/torvalds/linux/commit/427215d85e8d1476da1a86b8d67aceb485eb3631 - Patch, Third Party Advisory
References () https://ubuntu.com/security/CVE-2021-3732 - Third Party Advisory () https://ubuntu.com/security/CVE-2021-3732 - Third Party Advisory

13 Dec 2022, 19:50

Type Values Removed Values Added
Summary A security issue was found in Linux kernel’s OverlayFS subsystem where a local attacker who has the ability to mount the TmpFS filesystem with OverlayFS can abuse a logic bug in the overlayfs code which can inadvertently reveal files hidden in the original mount. A flaw was found in the Linux kernel's OverlayFS subsystem in the way the user mounts the TmpFS filesystem with OverlayFS. This flaw allows a local user to gain access to hidden files that should not be accessible.

14 Mar 2022, 23:56

Type Values Removed Values Added
References (MISC) https://github.com/torvalds/linux/commit/427215d85e8d1476da1a86b8d67aceb485eb3631 - (MISC) https://github.com/torvalds/linux/commit/427215d85e8d1476da1a86b8d67aceb485eb3631 - Patch, Third Party Advisory
References (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=1995249 - (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=1995249 - Issue Tracking, Patch, Third Party Advisory
References (MISC) https://ubuntu.com/security/CVE-2021-3732 - (MISC) https://ubuntu.com/security/CVE-2021-3732 - Third Party Advisory
References (MISC) https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=427215d85e8d1476da1a86b8d67aceb485eb3631 - (MISC) https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=427215d85e8d1476da1a86b8d67aceb485eb3631 - Mailing List, Patch, Vendor Advisory
CVSS v2 : unknown
v3 : unknown 		v2 : 2.1
v3 : 5.5
CWE NVD-CWE-noinfo
CPE cpe:2.3:o:linux:linux_kernel:5.14:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.14:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.14:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.14:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.14:rc5:*:*:*:*:*:*

10 Mar 2022, 17:54

Type Values Removed Values Added
New CVE
Information

Published : 2022-03-10 17:42

Updated : 2024-11-21 06:22

NVD link : CVE-2021-3732

Mitre link : CVE-2021-3732

CVE.ORG link : CVE-2021-3732

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

NVD-CWE-noinfo