CVE-2021-4157

Aliases:UBUNTU-CVE-2021-4157DEBIAN-CVE-2021-4157
Advisory lineage Upstream: 0 Downstream: 19
Modified
Published: 25 Mar 2022, 18:02
Last modified:03 Aug 2024, 17:16

Vulnerability Summary

Overall Risk (default)
medium
32/100
CVSS Score
8 HIGH
v3.1 (nvd)
EPSS Score
1.58% LOW
2% probability +1.53%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

25 Mar 2022, 18:02
Published
Vulnerability first disclosed
03 Aug 2024, 17:16
Last Modified
Vulnerability information updated

Description

An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in the way users use mirroring (replication of files with NFS). A user, having access to the NFS mount, could potentially use this flaw to crash the system or escalate privileges on the system.

CVSS Metrics

  • v4.0•HIGH•Score: 7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
  • v3.1•HIGH•Score: 8CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • v2.0•HIGH•Score: 7.4AV:A/AC:M/Au:S/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 1.58%• Percentile: 74%

Techniques & Countermeasures

  • CWE-119•Improper Restriction of Operations within the Bounds of a Memory Buffer

    The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Affected Systems

  • debian•linux

    < 5.10.38-1 | < 5.10.38-1 | < 5.10.38-1 | < 5.10.38-1

  • ubuntu•linux

    < 4.4.0-224.257 | < 4.15.0-151.157 | < 5.4.0-80.90

  • ubuntu•linux-aws

    < 4.4.0-1104.109 | < 4.4.0-1140.154 | < 4.15.0-1109.116 | < 5.4.0-1054.57

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    < 5.11.0-1014.15~20.04.1

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1054.57~18.04.1

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-fips

    < 4.15.0-2051.53 | all | < 5.4.0-1069.73+fips2

  • ubuntu•linux-aws-hwe

    < 4.15.0-1109.116~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1121.134~14.04.1 | < 4.15.0-1121.134~16.04.1 | all | < 5.4.0-1055.57

  • ubuntu•linux-azure-4.15

    < 4.15.0-1121.134

  • ubuntu•linux-azure-5.11

    < 5.11.0-1012.13~20.04.1

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1055.57~18.04.1

  • ubuntu•linux-azure-5.8

    all

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2033.37 | all | < 5.4.0-1073.76+fips1

  • ubuntu•linux-bluefield

    all | < 5.4.0-1016.19

  • ubuntu•linux-dell300x

    < 4.15.0-1027.32

  • ubuntu•linux-fips

    < 4.4.0-1074.80 | all | < 4.15.0-1066.75 | < 5.4.0-1031.36

  • ubuntu•linux-gcp

    < 4.15.0-1106.120~16.04.1 | all | < 5.4.0-1049.53

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1106.120

  • ubuntu•linux-gcp-5.11

    < 5.11.0-1014.16~20.04.1

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1049.53~18.04.1

  • ubuntu•linux-gcp-5.8

    all

  • ubuntu•linux-gcp-fips

    < 4.15.0-2016.18 | all | < 5.4.0-1067.71~20.04.1

  • ubuntu•linux-gke

    < 5.4.0-1049.52

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.4

    < 5.4.0-1049.52~18.04.1

  • ubuntu•linux-gkeop

    < 5.4.0-1021.22

  • ubuntu•linux-gkeop-5.4

    < 5.4.0-1021.22~18.04.1

  • ubuntu•linux-hwe

    < 4.15.0-151.157~16.04.1 | all

  • ubuntu•linux-hwe-5.11

    all

  • ubuntu•linux-hwe-5.4

    < 5.4.0-80.90~18.04.1

  • ubuntu•linux-hwe-5.8

    all

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-intel-5.13

    all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.4.0-1105.114 | < 4.15.0-1097.99 | < 5.4.0-1044.46

  • ubuntu•linux-lts-xenial

    < 4.4.0-224.257~14.04.1

  • ubuntu•linux-oem

    all

  • ubuntu•linux-oem-5.10

    < 5.10.0-1032.33

  • ubuntu•linux-oem-5.6

    all

  • ubuntu•linux-oracle

    < 4.15.0-1078.86~16.04.1 | < 4.15.0-1078.86 | < 5.4.0-1052.56

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.11

    < 5.11.0-1013.14~20.04.1

  • ubuntu•linux-oracle-5.3

    all

  • ubuntu•linux-oracle-5.4

    < 5.4.0-1052.56~18.04.1

Showing first 50 affected entries in server-rendered view.

References (9)