CVE-2020-24394

Aliases:UBUNTU-CVE-2020-24394DEBIAN-CVE-2020-24394
Advisory lineage Upstream: 0 Downstream: 26
Modified
Published: 19 Aug 2020, 00:00
Last modified:04 Aug 2024, 15:12

Vulnerability Summary

Overall Risk (default)
medium
28/100
CVSS Score
7.1 HIGH
v3.1 (nvd)
EPSS Score
0.36% LOW
0% probability +0.31%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

19 Aug 2020, 00:00
Published
Vulnerability first disclosed
04 Aug 2024, 15:12
Last Modified
Vulnerability information updated

Description

In the Linux kernel before 5.7.8, fs/nfsd/vfs.c (in the NFS server) can set incorrect permissions on new filesystem objects when the filesystem lacks ACL support, aka CID-22cf8419f131. This occurs because the current umask is not considered.

CVSS Metrics

  • v3.1•HIGH•Score: 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
  • v2.0•LOW•Score: 3.6AV:L/AC:L/Au:N/C:P/I:P/A:N

EPSS Trends

Current EPSS score: 0.36%• Percentile: 30%

Techniques & Countermeasures

  • CWE-732•Incorrect Permission Assignment for Critical Resource

    The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.

Affected Systems

  • canonical•ubuntu_linux

    14.04 | 16.04 | 18.04 | 20.04

  • debian•linux

    < 5.7.6-1 | < 5.7.6-1 | < 5.7.6-1 | < 5.7.6-1

  • ubuntu•linux

    < 4.15.0-115.116 | < 5.4.0-45.49

  • ubuntu•linux-aws

    < 4.15.0-1080.84 | < 5.4.0-1022.22

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.3

    < 5.3.0-1033.35

  • ubuntu•linux-aws-5.4

    < 5.4.0-1022.22~18.04.1

  • ubuntu•linux-aws-fips

    < 4.15.0-2025.25 | all | < 5.4.0-1069.73+fips2

  • ubuntu•linux-aws-hwe

    < 4.15.0-1080.84~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1093.103~14.04.1 | < 4.15.0-1093.103~16.04.1 | all | < 5.4.0-1023.23

  • ubuntu•linux-azure-4.15

    < 4.15.0-1093.103

  • ubuntu•linux-azure-5.3

    < 5.3.0-1035.36

  • ubuntu•linux-azure-5.4

    < 5.4.0-1023.23~18.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2007.8 | all | < 5.4.0-1073.76+fips1

  • ubuntu•linux-bluefield

    all

  • ubuntu•linux-fips

    < 4.15.0-1039.44

  • ubuntu•linux-gcp

    < 4.15.0-1081.92~16.04.1 | all | < 5.4.0-1022.22

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1081.92

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1022.22~18.04.1

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gcp-fips

    all | < 5.4.0-1067.71~20.04.1

  • ubuntu•linux-gke

    all

  • ubuntu•linux-gke-4.15

    < 4.15.0-1067.70

  • ubuntu•linux-gke-5.3

    < 5.3.0-1033.35

  • ubuntu•linux-hwe

    < 4.15.0-115.116~16.04.1 | < 5.3.0-65.59

  • ubuntu•linux-hwe-5.4

    < 5.4.0-45.49~18.04.2

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.15.0-1072.73 | < 5.4.0-1021.21

  • ubuntu•linux-oem

    < 4.15.0-1094.104

  • ubuntu•linux-oem-5.6

    < 5.6.0-1031.32

  • ubuntu•linux-oracle

    < 4.15.0-1051.55~16.04.1 | < 4.15.0-1051.55 | < 5.4.0-1022.22

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.3

    all

  • ubuntu•linux-oracle-5.4

    < 5.4.0-1022.22~18.04.1

  • ubuntu•linux-raspi

    < 5.4.0-1016.17

  • ubuntu•linux-raspi-5.4

    < 5.4.0-1016.17~18.04.1

  • ubuntu•linux-raspi-realtime

    all

  • ubuntu•linux-raspi2

    < 4.15.0-1068.72 | all

  • ubuntu•linux-raspi2-5.3

    < 5.3.0-1032.34

  • ubuntu•linux-realtime

    all

  • ubuntu•linux-riscv

    < 5.4.0-31.35 | all

  • ubuntu•linux-snapdragon

    < 4.15.0-1084.92

  • linux•linux_kernel

    < 5.7.8

  • opensuse•leap

    15.1

  • oracle•sd-wan_edge

    8.2

  • starwindsoftware•starwind_virtual_san

    v8:build12533 | v8:build12658 | v8:build12859 | v8:build13170 | v8:build13586 | v8:build13861

References (16)