CVE-2020-0423: Use After Free

Published Oct 1, 2020
·
Updated

In binderreleasework of binder.c, there is a possible use-after-free due to improper locking. This could lead to local escalation of privilege in the kernel with no additional execution privileges needed. User interaction is not needed for exploitation.

Affected Software

71 affected componentsFixes available
Google Android
Debian Debian Linux=9.0
debian/linux
5.10.223-15.10.234-16.1.129-16.1.135-16.12.25-16.12.27-1
Google Android
android/:unknown:>=:0<:2020-10-05
:2020-10-05
ubuntu/linux-azure<4.15.0-1103.114~14.04.1
4.15.0-1103.114~14.04.1
ubuntu/linux-aws-hwe<4.15.0-1091.96~16.04.1
4.15.0-1091.96~16.04.1
ubuntu/linux-azure<4.15.0-1103.114~16.04.1
4.15.0-1103.114~16.04.1
ubuntu/linux-gcp<4.15.0-1091.104~16.04.1
4.15.0-1091.104~16.04.1
ubuntu/linux-hwe<4.15.0-129.132~16.04.1
4.15.0-129.132~16.04.1
ubuntu/linux-oracle<4.15.0-1062.68~16.04.1
4.15.0-1062.68~16.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux<4.15.0-129.132
4.15.0-129.132
ubuntu/linux-aws<4.15.0-1091.96
4.15.0-1091.96
ubuntu/linux-aws-5.4<5.4.0-1030.31~18.04.1
5.4.0-1030.31~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1103.114
4.15.0-1103.114
ubuntu/linux-azure-5.4<5.4.0-1032.33~18.04.1
5.4.0-1032.33~18.04.1
ubuntu/linux-dell300x<4.15.0-1010.14
4.15.0-1010.14
ubuntu/linux-gcp-4.15<4.15.0-1091.104
4.15.0-1091.104
ubuntu/linux-gcp-5.4<5.4.0-1030.32~18.04.1
5.4.0-1030.32~18.04.1
ubuntu/linux-gke-4.15<4.15.0-1077.82
4.15.0-1077.82
ubuntu/linux-gke-5.4<5.4.0-1030.32~18.04.1
5.4.0-1030.32~18.04.1
ubuntu/linux-gkeop-5.4<5.4.0-1005.6
5.4.0-1005.6
ubuntu/linux-hwe-5.4<5.4.0-56.62~18.04.1
5.4.0-56.62~18.04.1
ubuntu/linux-kvm<4.15.0-1082.84
4.15.0-1082.84
ubuntu/linux-oracle<4.15.0-1062.68
4.15.0-1062.68
ubuntu/linux-oracle-5.4<5.4.0-1030.32~18.04.1
5.4.0-1030.32~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1023.26~18.04.1
5.4.0-1023.26~18.04.1
ubuntu/linux-raspi2<4.15.0-1077.82
4.15.0-1077.82
ubuntu/linux-snapdragon<4.15.0-1094.103
4.15.0-1094.103
ubuntu/linux-aws-5.0*
ubuntu/linux-aws-5.3*
ubuntu/linux-azure*
ubuntu/linux-azure-5.3*
ubuntu/linux-azure-edge*
ubuntu/linux-gcp*
ubuntu/linux-gcp-5.3*
ubuntu/linux-gcp-edge*
ubuntu/linux-hwe*
ubuntu/linux-hwe-edge*
ubuntu/linux-oem*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-aws-fips<4.15.0-2034.35
4.15.0-2034.35
ubuntu/linux-azure-fips<4.15.0-2016.18
4.15.0-2016.18
ubuntu/linux-fips<4.15.0-1049.56
4.15.0-1049.56
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-56.62
5.4.0-56.62
ubuntu/linux-aws<5.4.0-1030.31
5.4.0-1030.31
ubuntu/linux-azure<5.4.0-1032.33
5.4.0-1032.33
ubuntu/linux-gcp<5.4.0-1030.32
5.4.0-1030.32
ubuntu/linux-hwe-5.8<5.8.0-31.33~20.04.1
5.8.0-31.33~20.04.1
ubuntu/linux-kvm<5.4.0-1028.29
5.4.0-1028.29
ubuntu/linux-oem-5.6<5.6.0-1053.57
5.6.0-1053.57
ubuntu/linux-oracle<5.4.0-1030.32
5.4.0-1030.32
ubuntu/linux-raspi<5.4.0-1023.26
5.4.0-1023.26
ubuntu/linux-riscv<5.4.0-37.42
5.4.0-37.42
ubuntu/linux-raspi2*
ubuntu/linux-aws-fips<5.4.0-1069.73+fips2
5.4.0-1069.73+fips2
ubuntu/linux-azure-fips<5.4.0-1073.76+fips1
5.4.0-1073.76+fips1
ubuntu/linux-gcp-fips<5.4.0-1067.71~20.04.1
5.4.0-1067.71~20.04.1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-realtime*
ubuntu/linux-raspi-realtime*
ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 5.10.223-1Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.25-1Fixed in 6.12.27-1
  2. Upgrade

    Upgrade android/:unknown: to a version that resolves this vulnerability.

    Fixed in :2020-10-05
  3. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 4.15.0-1103.114~14.04.1
  4. Upgrade

    Upgrade ubuntu/linux-aws-hwe to a version that resolves this vulnerability.

    Fixed in 4.15.0-1091.96~16.04.1
  5. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 4.15.0-1103.114~16.04.1
  6. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 4.15.0-1091.104~16.04.1
  7. Upgrade

    Upgrade ubuntu/linux-hwe to a version that resolves this vulnerability.

    Fixed in 4.15.0-129.132~16.04.1
  8. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 4.15.0-1062.68~16.04.1
  9. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 4.15.0-129.132
  10. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 4.15.0-1091.96
  11. Upgrade

    Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1030.31~18.04.1
  12. Upgrade

    Upgrade ubuntu/linux-azure-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1103.114
  13. Upgrade

    Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1032.33~18.04.1
  14. Upgrade

    Upgrade ubuntu/linux-dell300x to a version that resolves this vulnerability.

    Fixed in 4.15.0-1010.14
  15. Upgrade

    Upgrade ubuntu/linux-gcp-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1091.104
  16. Upgrade

    Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1030.32~18.04.1
  17. Upgrade

    Upgrade ubuntu/linux-gke-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1077.82
  18. Upgrade

    Upgrade ubuntu/linux-gke-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1030.32~18.04.1
  19. Upgrade

    Upgrade ubuntu/linux-gkeop-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1005.6
  20. Upgrade

    Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-56.62~18.04.1
  21. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 4.15.0-1082.84
  22. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 4.15.0-1062.68
  23. Upgrade

    Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1030.32~18.04.1
  24. Upgrade

    Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1023.26~18.04.1
  25. Upgrade

    Upgrade ubuntu/linux-raspi2 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1077.82
  26. Upgrade

    Upgrade ubuntu/linux-snapdragon to a version that resolves this vulnerability.

    Fixed in 4.15.0-1094.103
  27. Upgrade

    Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-2034.35
  28. Upgrade

    Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-2016.18
  29. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-1049.56
  30. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 5.4.0-56.62
  31. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 5.4.0-1030.31
  32. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 5.4.0-1032.33
  33. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 5.4.0-1030.32
  34. Upgrade

    Upgrade ubuntu/linux-hwe-5.8 to a version that resolves this vulnerability.

    Fixed in 5.8.0-31.33~20.04.1
  35. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 5.4.0-1028.29
  36. Upgrade

    Upgrade ubuntu/linux-oem-5.6 to a version that resolves this vulnerability.

    Fixed in 5.6.0-1053.57
  37. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 5.4.0-1030.32
  38. Upgrade

    Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.

    Fixed in 5.4.0-1023.26
  39. Upgrade

    Upgrade ubuntu/linux-riscv to a version that resolves this vulnerability.

    Fixed in 5.4.0-37.42
  40. Upgrade

    Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1069.73+fips2
  41. Upgrade

    Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1073.76+fips1
  42. Upgrade

    Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1067.71~20.04.1

Event History

Oct 1, 2020
Advisory Published
via OSV·12:00 AM
Data Sourced
via OSV·12:00 AM
DescriptionAffected Software
Oct 5, 2020
CVE Published
via Android·12:00 AM
Data Sourced
via Android·12:00 AM
SeverityWeaknessAffected Software
Oct 14, 2020
CVE Published
via MITRE·01:07 PM
Data Sourced
via MITRE·01:07 PM
DescriptionWeakness
Data Sourced
via OSV·02:15 PM
Severity
Mar 19, 2024
Exploit Published
via GitHub·01:47 AM

Frequently Asked Questions

1

What is the severity of CVE-2020-0423?

CVE-2020-0423 is considered a high severity vulnerability that allows for local escalation of privilege due to a use-after-free error.

2

How do I fix CVE-2020-0423?

To fix CVE-2020-0423, update your affected Android or Debian kernel to the recommended versions such as 5.10.223-1 or later.

3

What systems are affected by CVE-2020-0423?

CVE-2020-0423 affects Google Android and Debian Linux version 9.0 and earlier.

4

Can CVE-2020-0423 be exploited without user interaction?

Yes, CVE-2020-0423 can be exploited without any user interaction required.

5

What type of vulnerability is CVE-2020-0423?

CVE-2020-0423 is a use-after-free vulnerability found in the binder_release_work function of the Android kernel.

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