CVE-2020-28974

Aliases:UBUNTU-CVE-2020-28974DEBIAN-CVE-2020-28974
Advisory lineage Upstream: 0 Downstream: 31
Modified
Published: 20 Nov 2020, 17:49
Last modified:04 Aug 2024, 16:48

Vulnerability Summary

Overall Risk (default)
medium
35/100
CVSS Score
6.1 MEDIUM
v2.0 (nvd)
EPSS Score
0.52% LOW
1% probability +0.46%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

20 Nov 2020, 17:49
Published
Vulnerability first disclosed
04 Aug 2024, 16:48
Last Modified
Vulnerability information updated

Description

A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H
  • v2.0•MEDIUM•Score: 6.1AV:L/AC:L/Au:N/C:P/I:P/A:C

EPSS Trends

Current EPSS score: 0.52%• Percentile: 43%

Techniques & Countermeasures

  • CWE-125•Out-of-bounds Read

    The product reads data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • debian•linux

    < 5.9.9-1 | < 5.9.9-1 | < 5.9.9-1 | < 5.9.9-1

  • ubuntu•linux

    all | < 4.4.0-198.230 | < 4.15.0-129.132 | < 5.4.0-59.65

  • ubuntu•linux-aws

    < 4.4.0-1083.87 | < 4.4.0-1119.133 | < 4.15.0-1091.96 | < 5.4.0-1034.35

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1034.35~18.04.1

  • ubuntu•linux-aws-fips

    < 4.15.0-2034.35 | all | < 5.4.0-1069.73+fips2

  • ubuntu•linux-aws-hwe

    < 4.15.0-1091.96~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1103.114~14.04.1 | < 4.15.0-1103.114~16.04.1 | all | < 5.4.0-1035.36

  • ubuntu•linux-azure-4.15

    < 4.15.0-1103.114

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1035.36~18.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde-5.15

    < 5.15.0-1114.123~20.04.1

  • ubuntu•linux-azure-fips

    < 4.15.0-2016.18 | all | < 5.4.0-1073.76+fips1

  • ubuntu•linux-bluefield

    all

  • ubuntu•linux-dell300x

    < 4.15.0-1010.14

  • ubuntu•linux-fips

    < 4.4.0-1052.58 | all | < 4.15.0-1049.56

  • ubuntu•linux-gcp

    < 4.15.0-1091.104~16.04.1 | all | < 5.4.0-1033.35

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1091.104

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1033.35~18.04.1

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gcp-fips

    all | < 5.4.0-1067.71~20.04.1

  • ubuntu•linux-gke-4.15

    < 4.15.0-1077.82

  • ubuntu•linux-gke-5.4

    < 5.4.0-1033.35~18.04.1

  • ubuntu•linux-gkeop-5.4

    < 5.4.0-1008.9~18.04.1

  • ubuntu•linux-hwe

    < 4.15.0-129.132~16.04.1 | all

  • ubuntu•linux-hwe-5.4

    < 5.4.0-59.65~18.04.1

  • ubuntu•linux-hwe-5.8

    < 5.8.0-44.50~20.04.1

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.4.0-1085.94 | < 4.15.0-1082.84 | < 5.4.0-1031.32

  • ubuntu•linux-lts-xenial

    < 4.4.0-198.230~14.04.1

  • ubuntu•linux-oem

    all

  • ubuntu•linux-oem-5.6

    < 5.6.0-1039.43

  • ubuntu•linux-oracle

    < 4.15.0-1062.68~16.04.1 | < 4.15.0-1062.68 | < 5.4.0-1034.36

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.3

    all

  • ubuntu•linux-oracle-5.4

    < 5.4.0-1034.36~18.04.1

  • ubuntu•linux-raspi

    < 5.4.0-1026.29

  • ubuntu•linux-raspi-5.4

    < 5.4.0-1026.29~18.04.1

  • ubuntu•linux-raspi-realtime

    all

  • ubuntu•linux-raspi2

    < 4.4.0-1143.153 | < 4.15.0-1077.82 | all

  • ubuntu•linux-realtime

    all

  • ubuntu•linux-riscv

    < 5.4.0-40.45

  • ubuntu•linux-riscv-5.8

    < 5.8.0-17.19~20.04.1

  • ubuntu•linux-snapdragon

    < 4.4.0-1147.157 | < 4.15.0-1094.103

  • debian•debian_linux

    9.0

  • linux•linux_kernel

    < 5.9.7

References (17)