CVE-2021-3732

Aliases:UBUNTU-CVE-2021-3732DEBIAN-CVE-2021-3732
Advisory lineage Upstream: 0 Downstream: 36
Modified
Published: 07 Mar 2022, 13:56
Last modified:03 Aug 2024, 17:01

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.33% LOW
0% probability +0.31%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

07 Mar 2022, 13:56
Published
Vulnerability first disclosed
03 Aug 2024, 17:01
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v4.0•MEDIUM•Score: 4.8CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
  • v2.0•LOW•Score: 2.1AV:L/AC:L/Au:N/C:P/I:N/A:N

EPSS Trends

Current EPSS score: 0.33%• Percentile: 27%

Techniques & Countermeasures

  • CWE-200•Exposure of Sensitive Information to an Unauthorized Actor

    The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Affected Systems

  • debian•linux

    < 5.10.46-5 | < 5.14.6-1 | < 5.14.6-1 | < 5.14.6-1

  • ubuntu•linux

    all | < 4.4.0-239.273 | < 4.15.0-159.167 | < 5.4.0-89.100

  • ubuntu•linux-aws

    < 4.4.0-1117.123 | < 4.4.0-1155.170 | < 4.15.0-1112.119 | < 5.4.0-1058.61

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    < 5.11.0-1020.21~20.04.2

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1058.61~18.04.3

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-fips

    < 4.15.0-2054.56 | all | < 5.4.0-1069.73+fips2

  • ubuntu•linux-aws-hwe

    < 4.15.0-1112.119~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1124.137~14.04.1 | < 4.15.0-1124.137~16.04.1 | all | < 5.4.0-1062.65

  • ubuntu•linux-azure-4.15

    < 4.15.0-1124.137

  • ubuntu•linux-azure-5.11

    < 5.11.0-1020.21~20.04.1

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1062.65~18.04.1

  • ubuntu•linux-azure-5.8

    all

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2036.40 | all | < 5.4.0-1073.76+fips1

  • ubuntu•linux-bluefield

    all | < 5.4.0-1020.23

  • ubuntu•linux-dell300x

    < 4.15.0-1028.33

  • ubuntu•linux-fips

    < 4.4.0-1088.95 | all | < 4.15.0-1070.79 | < 5.4.0-1035.41

  • ubuntu•linux-gcp

    < 4.15.0-1109.123~16.04.1 | all | < 5.4.0-1056.60

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1109.123

  • ubuntu•linux-gcp-5.11

    < 5.11.0-1021.23~20.04.1

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1056.60~18.04.1

  • ubuntu•linux-gcp-5.8

    all

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gcp-fips

    < 4.15.0-2019.21 | all | < 5.4.0-1067.71~20.04.1

  • ubuntu•linux-gke

    < 5.4.0-1054.57

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.4

    < 5.4.0-1054.57~18.04.1

  • ubuntu•linux-gkeop

    < 5.4.0-1025.26

  • ubuntu•linux-gkeop-5.4

    < 5.4.0-1025.26~18.04.1

  • ubuntu•linux-hwe

    < 4.15.0-159.167~16.04.1 | all

  • ubuntu•linux-hwe-5.11

    < 5.11.0-38.42~20.04.1

  • ubuntu•linux-hwe-5.4

    < 5.4.0-89.100~18.04.1

  • ubuntu•linux-hwe-5.8

    all

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-ibm

    < 5.4.0-1006.7

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.4.0-1118.128 | < 4.15.0-1100.102 | < 5.4.0-1048.50

  • ubuntu•linux-lts-xenial

    < 4.4.0-239.273~14.04.1

  • ubuntu•linux-oem

    all

  • ubuntu•linux-oem-5.10

    < 5.10.0-1050.52

  • ubuntu•linux-oem-5.13

    < 5.13.0-1014.18

  • ubuntu•linux-oem-5.6

    all

  • ubuntu•linux-oracle

    < 4.15.0-1081.89~16.04.1 | < 4.15.0-1081.89 | < 5.4.0-1056.60

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.11

    < 5.11.0-1020.21~20.04.1

Showing first 50 affected entries in server-rendered view.

References (17)