CVE-2021-3655: Input Validation

Published Jul 20, 2021
·
Updated

A vulnerability was found in the Linux kernel in versions prior to v5.14-rc1. Missing size validations on inbound SCTP packets may allow the kernel to read uninitialized memory.

Other sources

A vulnerability was found in the Linux kernel. Missing size validations on inbound SCTP packets may allow the kernel to read uninitialized memory.

Reference and upstream patch: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=f9beb95e6a2669fa35e34a6ff52808b181efa20f

— Red Hat

In sctpv6toskdaddr, sctpv4fromaddrparam, and related functions of ipv6.c, protocol.c, and related files, there is a possible out of bounds read due to a missing bounds check. This could lead to remote information disclosure to an on-path attacker with no additional execution privileges needed. User interaction is not needed for exploitation.

— OSV

Affected Software

104 affected componentsFixes available
Linux Linux kernel<5.14
Linux Linux kernel=5.14
redhat Enterprise Linux=8.0
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
ubuntu/linux-azure<4.15.0-1126.139~14.04.1
4.15.0-1126.139~14.04.1
ubuntu/linux*
ubuntu/linux-aws*
ubuntu/linux-lts-xenial*
ubuntu/linux-aws-hwe<4.15.0-1115.122~16.04.1
4.15.0-1115.122~16.04.1
ubuntu/linux-azure<4.15.0-1126.139~16.04.1
4.15.0-1126.139~16.04.1
ubuntu/linux-gcp<4.15.0-1111.125~16.04.1
4.15.0-1111.125~16.04.1
ubuntu/linux-hwe<4.15.0-162.170~16.04.1
4.15.0-162.170~16.04.1
ubuntu/linux-oracle<4.15.0-1083.91~16.04.1
4.15.0-1083.91~16.04.1
ubuntu/linux*
ubuntu/linux-aws*
ubuntu/linux-hwe-edge*
ubuntu/linux-kvm*
ubuntu/linux-fips*
ubuntu/linux-fips*
ubuntu/linux<4.15.0-162.170
4.15.0-162.170
ubuntu/linux-aws<4.15.0-1115.122
4.15.0-1115.122
ubuntu/linux-aws-5.4<5.4.0-1060.63~18.04.1
5.4.0-1060.63~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1126.139
4.15.0-1126.139
ubuntu/linux-azure-5.4<5.4.0-1064.67~18.04.1
5.4.0-1064.67~18.04.1
ubuntu/linux-dell300x<4.15.0-1030.35
4.15.0-1030.35
ubuntu/linux-gcp-4.15<4.15.0-1111.125
4.15.0-1111.125
ubuntu/linux-gcp-5.4<5.4.0-1058.62~18.04.1
5.4.0-1058.62~18.04.1
ubuntu/linux-gke-5.4<5.4.0-1056.59~18.04.1
5.4.0-1056.59~18.04.1
ubuntu/linux-gkeop-5.4<5.4.0-1027.28~18.04.1
5.4.0-1027.28~18.04.1
ubuntu/linux-hwe-5.4<5.4.0-91.102~18.04.1
5.4.0-91.102~18.04.1
ubuntu/linux-kvm<4.15.0-1102.104
4.15.0-1102.104
ubuntu/linux-oracle<4.15.0-1083.91
4.15.0-1083.91
ubuntu/linux-oracle-5.4<5.4.0-1058.62~18.04.1
5.4.0-1058.62~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1047.52~18.04.1
5.4.0-1047.52~18.04.1
ubuntu/linux-raspi2<4.15.0-1098.104
4.15.0-1098.104
ubuntu/linux-snapdragon<4.15.0-1115.124
4.15.0-1115.124
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-gke-4.15*
ubuntu/linux-hwe*
ubuntu/linux-hwe-edge*
ubuntu/linux-oem*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-aws-fips<4.15.0-2056.58
4.15.0-2056.58
ubuntu/linux-azure-fips<4.15.0-2038.42
4.15.0-2038.42
ubuntu/linux-fips<4.15.0-1072.81
4.15.0-1072.81
ubuntu/linux-gcp-fips<4.15.0-2021.23
4.15.0-2021.23
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-91.102
5.4.0-91.102
ubuntu/linux-aws<5.4.0-1060.63
5.4.0-1060.63
ubuntu/linux-aws-5.11<5.11.0-1022.23~20.04.1
5.11.0-1022.23~20.04.1
ubuntu/linux-azure<5.4.0-1064.67
5.4.0-1064.67
ubuntu/linux-azure-5.11<5.11.0-1022.23~20.04.1
5.11.0-1022.23~20.04.1
ubuntu/linux-bluefield<5.4.0-1022.25
5.4.0-1022.25
ubuntu/linux-gcp<5.4.0-1058.62
5.4.0-1058.62
ubuntu/linux-gcp-5.11<5.11.0-1023.25~20.04.1
5.11.0-1023.25~20.04.1
ubuntu/linux-gke<5.4.0-1056.59
5.4.0-1056.59
ubuntu/linux-gkeop<5.4.0-1027.28
5.4.0-1027.28
ubuntu/linux-hwe-5.11<5.11.0-41.45~20.04.1
5.11.0-41.45~20.04.1
ubuntu/linux-hwe-5.13<5.13.0-22.22~20.04.1
5.13.0-22.22~20.04.1
ubuntu/linux-ibm<5.4.0-1008.9
5.4.0-1008.9
ubuntu/linux-kvm<5.4.0-1050.52
5.4.0-1050.52
ubuntu/linux-oem-5.10<5.10.0-1051.53
5.10.0-1051.53
ubuntu/linux-oem-5.13<5.13.0-1020.24
5.13.0-1020.24
ubuntu/linux-oracle<5.4.0-1058.62
5.4.0-1058.62
ubuntu/linux-oracle-5.11<5.11.0-1022.23~20.04.1
5.11.0-1022.23~20.04.1
ubuntu/linux-raspi<5.4.0-1047.52
5.4.0-1047.52
ubuntu/linux-riscv-5.11<5.11.0-1023.24~20.04.1
5.11.0-1023.24~20.04.1
ubuntu/linux-aws-5.8*
ubuntu/linux-azure-5.8*
ubuntu/linux-azure-fde-5.15<5.15.0-1114.123~20.04.1
5.15.0-1114.123~20.04.1
ubuntu/linux-gcp-5.8*
ubuntu/linux-hwe-5.8*
ubuntu/linux-intel-5.13*
ubuntu/linux-oem-5.6*
ubuntu/linux-oracle-5.8*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.8*
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-fips<5.4.0-1037.43
5.4.0-1037.43
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-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-realtime*
ubuntu/linux-raspi-realtime*
ubuntu/linux-vmware*
android/:linux_kernel:>=:0<:2022-03-05
:2022-03-05

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/:linux_kernel: to a version that resolves this vulnerability.

    Fixed in :2022-03-05
  3. Upgrade

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

    Fixed in 4.15.0-1126.139~14.04.1
  4. Upgrade

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

    Fixed in 4.15.0-1115.122~16.04.1
  5. Upgrade

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

    Fixed in 4.15.0-1126.139~16.04.1
  6. Upgrade

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

    Fixed in 4.15.0-1111.125~16.04.1
  7. Upgrade

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

    Fixed in 4.15.0-162.170~16.04.1
  8. Upgrade

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

    Fixed in 4.15.0-1083.91~16.04.1
  9. Upgrade

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

    Fixed in 4.15.0-162.170
  10. Upgrade

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

    Fixed in 4.15.0-1115.122
  11. Upgrade

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

    Fixed in 5.4.0-1060.63~18.04.1
  12. Upgrade

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

    Fixed in 4.15.0-1126.139
  13. Upgrade

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

    Fixed in 5.4.0-1064.67~18.04.1
  14. Upgrade

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

    Fixed in 4.15.0-1030.35
  15. Upgrade

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

    Fixed in 4.15.0-1111.125
  16. Upgrade

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

    Fixed in 5.4.0-1058.62~18.04.1
  17. Upgrade

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

    Fixed in 5.4.0-1056.59~18.04.1
  18. Upgrade

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

    Fixed in 5.4.0-1027.28~18.04.1
  19. Upgrade

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

    Fixed in 5.4.0-91.102~18.04.1
  20. Upgrade

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

    Fixed in 4.15.0-1102.104
  21. Upgrade

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

    Fixed in 4.15.0-1083.91
  22. Upgrade

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

    Fixed in 5.4.0-1058.62~18.04.1
  23. Upgrade

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

    Fixed in 5.4.0-1047.52~18.04.1
  24. Upgrade

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

    Fixed in 4.15.0-1098.104
  25. Upgrade

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

    Fixed in 4.15.0-1115.124
  26. Upgrade

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

    Fixed in 4.15.0-2056.58
  27. Upgrade

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

    Fixed in 4.15.0-2038.42
  28. Upgrade

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

    Fixed in 4.15.0-1072.81
  29. Upgrade

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

    Fixed in 4.15.0-2021.23
  30. Upgrade

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

    Fixed in 5.4.0-91.102
  31. Upgrade

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

    Fixed in 5.4.0-1060.63
  32. Upgrade

    Upgrade ubuntu/linux-aws-5.11 to a version that resolves this vulnerability.

    Fixed in 5.11.0-1022.23~20.04.1
  33. Upgrade

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

    Fixed in 5.4.0-1064.67
  34. Upgrade

    Upgrade ubuntu/linux-azure-5.11 to a version that resolves this vulnerability.

    Fixed in 5.11.0-1022.23~20.04.1
  35. Upgrade

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

    Fixed in 5.4.0-1022.25
  36. Upgrade

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

    Fixed in 5.4.0-1058.62
  37. Upgrade

    Upgrade ubuntu/linux-gcp-5.11 to a version that resolves this vulnerability.

    Fixed in 5.11.0-1023.25~20.04.1
  38. Upgrade

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

    Fixed in 5.4.0-1056.59
  39. Upgrade

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

    Fixed in 5.4.0-1027.28
  40. Upgrade

    Upgrade ubuntu/linux-hwe-5.11 to a version that resolves this vulnerability.

    Fixed in 5.11.0-41.45~20.04.1
  41. Upgrade

    Upgrade ubuntu/linux-hwe-5.13 to a version that resolves this vulnerability.

    Fixed in 5.13.0-22.22~20.04.1
  42. Upgrade

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

    Fixed in 5.4.0-1008.9
  43. Upgrade

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

    Fixed in 5.4.0-1050.52
  44. Upgrade

    Upgrade ubuntu/linux-oem-5.10 to a version that resolves this vulnerability.

    Fixed in 5.10.0-1051.53
  45. Upgrade

    Upgrade ubuntu/linux-oem-5.13 to a version that resolves this vulnerability.

    Fixed in 5.13.0-1020.24
  46. Upgrade

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

    Fixed in 5.4.0-1058.62
  47. Upgrade

    Upgrade ubuntu/linux-oracle-5.11 to a version that resolves this vulnerability.

    Fixed in 5.11.0-1022.23~20.04.1
  48. Upgrade

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

    Fixed in 5.4.0-1047.52
  49. Upgrade

    Upgrade ubuntu/linux-riscv-5.11 to a version that resolves this vulnerability.

    Fixed in 5.11.0-1023.24~20.04.1
  50. Upgrade

    Upgrade ubuntu/linux-azure-fde-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1114.123~20.04.1
  51. Upgrade

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

    Fixed in 5.4.0-1069.73+fips2
  52. Upgrade

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

    Fixed in 5.4.0-1073.76+fips1
  53. Upgrade

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

    Fixed in 5.4.0-1037.43
  54. Upgrade

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

    Fixed in 5.4.0-1067.71~20.04.1
  55. Upgrade

    Upgrade Linux kernel to a version that resolves this vulnerability.

    Fixed in v5.14-rc1

Event History

Jul 20, 2021
Data Sourced
via Red Hat·01:03 PM
DescriptionSeverityAffected Software
Aug 5, 2021
CVE Published
via MITRE·08:48 PM
Data Sourced
via MITRE·08:48 PM
DescriptionWeakness
Data Sourced
via OSV·09:15 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·09:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Mar 1, 2022
Advisory Published
via OSV·12:00 AM
Mar 7, 2022
Data Sourced
via Android·12:00 AM
SeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2021-3655?

CVE-2021-3655 has been classified as a medium severity vulnerability.

2

How do I fix CVE-2021-3655?

To fix CVE-2021-3655, update the Linux kernel to version 5.14 or later.

3

Which versions of the Linux kernel are affected by CVE-2021-3655?

CVE-2021-3655 affects Linux kernel versions prior to v5.14-rc1.

4

What systems are impacted by CVE-2021-3655?

CVE-2021-3655 impacts various systems including Google Android, Red Hat Enterprise Linux 8.0, and Debian 9.0.

5

What type of vulnerability is CVE-2021-3655?

CVE-2021-3655 is a memory vulnerability caused by missing size validations on inbound SCTP packets.

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