CVE-2020-27170

Aliases:UBUNTU-CVE-2020-27170DEBIAN-CVE-2020-27170
Advisory lineage Upstream: 0 Downstream: 25
Modified
Published: 20 Mar 2021, 21:30
Last modified:04 Aug 2024, 16:11

Vulnerability Summary

Overall Risk (default)
low
19/100
CVSS Score
4.7 MEDIUM
v3.1 (nvd)
EPSS Score
0.56% LOW
1% probability +0.41%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

20 Mar 2021, 21:30
Published
Vulnerability first disclosed
04 Aug 2024, 16:11
Last Modified
Vulnerability information updated

Description

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-f232326f6966. This affects pointer types that do not define a ptr_limit.

CVSS Metrics

  • v3.1•MEDIUM•Score: 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
  • v2.0•LOW•Score: 1.9AV:L/AC:M/Au:N/C:P/I:N/A:N

EPSS Trends

Current EPSS score: 0.56%• Percentile: 46%

Techniques & Countermeasures

  • CWE-203•Observable Discrepancy

    The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.

Affected Systems

  • canonical•ubuntu_linux

    14.04 | 16.04 | 18.04 | 20.04

  • debian•linux

    < 5.10.24-1 | < 5.10.24-1 | < 5.10.24-1 | < 5.10.24-1

  • ubuntu•linux

    all | < 4.15.0-140.144 | < 5.4.0-70.78

  • ubuntu•linux-aws

    all | < 4.15.0-1097.104 | < 5.4.0-1041.43

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1041.43~18.04.1

  • ubuntu•linux-aws-fips

    < 4.15.0-2040.42 | all | < 5.4.0-1069.73+fips2

  • ubuntu•linux-aws-hwe

    < 4.15.0-1097.104~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1111.123~14.04.1 | < 4.15.0-1111.123~16.04.1 | all | < 5.4.0-1043.45

  • ubuntu•linux-azure-4.15

    < 4.15.0-1111.123

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1043.45~18.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2023.26 | all | < 5.4.0-1073.76+fips1

  • ubuntu•linux-bluefield

    all

  • ubuntu•linux-dell300x

    < 4.15.0-1015.19

  • ubuntu•linux-fips

    all | < 4.15.0-1056.64

  • ubuntu•linux-gcp

    < 4.15.0-1096.109~16.04.1 | all | < 5.4.0-1040.43

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1096.109

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1040.43~18.04.1

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gcp-fips

    all | < 5.4.0-1067.71~20.04.1

  • ubuntu•linux-gke

    < 5.4.0-1039.41

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.3

    < 5.3.0-1041.44

  • ubuntu•linux-gke-5.4

    < 5.4.0-1039.41~18.04.1

  • ubuntu•linux-gkeop

    < 5.4.0-1012.13

  • ubuntu•linux-gkeop-5.4

    < 5.4.0-1012.13~18.04.1

  • ubuntu•linux-hwe

    < 4.15.0-140.144~16.04.1 | < 5.3.0-72.68

  • ubuntu•linux-hwe-5.4

    < 5.4.0-70.78~18.04.1

  • ubuntu•linux-hwe-5.8

    < 5.8.0-48.54~20.04.1

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    all | < 4.15.0-1088.90 | < 5.4.0-1036.37

  • ubuntu•linux-lts-xenial

    all

  • ubuntu•linux-oem

    all

  • ubuntu•linux-oem-5.10

    < 5.10.0-1019.20

  • ubuntu•linux-oem-5.6

    < 5.6.0-1052.56

  • ubuntu•linux-oracle

    < 4.15.0-1068.76~16.04.1 | < 4.15.0-1068.76 | < 5.4.0-1041.44

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.3

    all

  • ubuntu•linux-oracle-5.4

    < 5.4.0-1041.44~18.04.1

  • ubuntu•linux-raspi

    < 5.4.0-1032.35

  • ubuntu•linux-raspi-5.4

    < 5.4.0-1032.35~18.04.1

  • ubuntu•linux-raspi-realtime

    all

  • ubuntu•linux-raspi2

    < 4.15.0-1082.87 | all

  • ubuntu•linux-raspi2-5.3

    < 5.3.0-1038.40

  • ubuntu•linux-realtime

    all

Showing first 50 affected entries in server-rendered view.

References (14)