CVE-2021-3772: Medium severity Linux Linux kernel vulnerability

Published Sep 2, 2021
·
Updated

A flaw was found in the Linux SCTP stack. A blind attacker may be able to kill an existing SCTP association through invalid chunks if the attacker knows the IP-addresses and port numbers being used and the attacker can send packets with spoofed IP addresses.

Affected Software

166 affected componentsFixes available
redhat/kernel-rt<0:4.18.0-372.9.1.rt7.166.el8
0:4.18.0-372.9.1.rt7.166.el8
redhat/kernel<0:4.18.0-372.9.1.el8
0:4.18.0-372.9.1.el8
Linux Linux kernel<5.15.0
redhat Enterprise Linux=8.0
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Oracle Communications Cloud Native Core Binding Support Function=22.1.3
Oracle Communications Cloud Native Core Network Exposure Function=22.1.1
Oracle Communications Cloud Native Core Policy=22.2.0
NetApp E-Series SANtricity OS Controller=11.0
NetApp E-Series SANtricity OS Controller=11.0.0
NetApp E-Series SANtricity OS Controller=11.20
NetApp E-Series SANtricity OS Controller=11.25
NetApp E-Series SANtricity OS Controller=11.30
NetApp E-Series SANtricity OS Controller=11.30.5r3
NetApp E-Series SANtricity OS Controller=11.40
NetApp E-Series SANtricity OS Controller=11.40.3r2
NetApp E-Series SANtricity OS Controller=11.40.5
NetApp E-Series SANtricity OS Controller=11.50.1
NetApp E-Series SANtricity OS Controller=11.50.2
NetApp E-Series SANtricity OS Controller=11.50.2-p1
NetApp E-Series SANtricity OS Controller=11.60
NetApp E-Series SANtricity OS Controller=11.60.0
NetApp E-Series SANtricity OS Controller=11.60.1
NetApp E-Series SANtricity OS Controller=11.60.3
NetApp E-Series SANtricity OS Controller=11.70.1
NetApp E-Series SANtricity OS Controller=11.70.2
NetApp Solidfire \& Hci Management Node
NetApp Solidfire \& Hci Storage Node
NetApp Hci Compute Node
NetApp H300s Firmware
NetApp H300s
NetApp H500s Firmware
NetApp H500s
NetApp H700s Firmware
NetApp H700s
NetApp H410s Firmware
NetApp H410s
NetApp H410c Firmware
NetApp H410c
NetApp H610c Firmware
NetApp H610c
NetApp H610s Firmware
NetApp H610s
NetApp H615c Firmware
NetApp H615c
All of the following
NetApp H300s Firmware
NetApp H300s
All of the following
NetApp H500s Firmware
NetApp H500s
All of the following
NetApp H700s Firmware
NetApp H700s
All of the following
NetApp H410s Firmware
NetApp H410s
All of the following
NetApp H410c Firmware
NetApp H410c
All of the following
NetApp H610c Firmware
NetApp H610c
All of the following
NetApp H610s Firmware
NetApp H610s
All of the following
NetApp H615c Firmware
NetApp H615c
debian/linux
6.1.176-16.1.190-16.12.107-16.12.115-27.2.12-17.2.15-1
ubuntu/linux-aws<4.4.0-1117.123
4.4.0-1117.123
ubuntu/linux-azure<4.15.0-1142.156~14.04.1
4.15.0-1142.156~14.04.1
ubuntu/linux-lts-xenial<4.4.0-239.273~14.04.1
4.4.0-239.273~14.04.1
ubuntu/linux*
ubuntu/linux<4.4.0-239.273
4.4.0-239.273
ubuntu/linux-aws<4.4.0-1155.170
4.4.0-1155.170
ubuntu/linux-aws-hwe<4.15.0-1133.143~16.04.1
4.15.0-1133.143~16.04.1
ubuntu/linux-azure<4.15.0-1142.156~16.04.1
4.15.0-1142.156~16.04.1
ubuntu/linux-gcp<4.15.0-1127.142~16.04.1
4.15.0-1127.142~16.04.1
ubuntu/linux-hwe<4.15.0-184.194~16.04.1
4.15.0-184.194~16.04.1
ubuntu/linux-kvm<4.4.0-1118.128
4.4.0-1118.128
ubuntu/linux-oracle<4.15.0-1098.108~16.04.1
4.15.0-1098.108~16.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux-fips<4.4.0-1088.95
4.4.0-1088.95
ubuntu/linux-fips*
ubuntu/linux<4.15.0-184.194
4.15.0-184.194
ubuntu/linux-aws<4.15.0-1133.143
4.15.0-1133.143
ubuntu/linux-aws-5.4<5.4.0-1078.84~18.04.1
5.4.0-1078.84~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1142.156
4.15.0-1142.156
ubuntu/linux-azure-5.4<5.4.0-1083.87~18.04.1
5.4.0-1083.87~18.04.1
ubuntu/linux-dell300x<4.15.0-1047.52
4.15.0-1047.52
ubuntu/linux-gcp-4.15<4.15.0-1127.142
4.15.0-1127.142
ubuntu/linux-gcp-5.4<5.4.0-1078.84~18.04.1
5.4.0-1078.84~18.04.1
ubuntu/linux-gke-5.4<5.4.0-1074.79~18.04.1
5.4.0-1074.79~18.04.1
ubuntu/linux-gkeop-5.4<5.4.0-1046.48~18.04.1
5.4.0-1046.48~18.04.1
ubuntu/linux-hwe-5.4<5.4.0-117.132~18.04.1
5.4.0-117.132~18.04.1
ubuntu/linux-ibm-5.4<5.4.0-1028.32~18.04.1
5.4.0-1028.32~18.04.1
ubuntu/linux-kvm<4.15.0-1119.123
4.15.0-1119.123
ubuntu/linux-oracle<4.15.0-1098.108
4.15.0-1098.108
ubuntu/linux-oracle-5.4<5.4.0-1076.83~18.04.1
5.4.0-1076.83~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1065.75~18.04.1
5.4.0-1065.75~18.04.1
ubuntu/linux-raspi2<4.15.0-1114.122
4.15.0-1114.122
ubuntu/linux-snapdragon<4.15.0-1132.142
4.15.0-1132.142
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<4.15.0-2072.76
4.15.0-2072.76
ubuntu/linux-azure-fips<4.15.0-2053.58
4.15.0-2053.58
ubuntu/linux-fips<4.15.0-1090.100
4.15.0-1090.100
ubuntu/linux-gcp-fips<4.15.0-2037.41
4.15.0-2037.41
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-117.132
5.4.0-117.132
ubuntu/linux-aws<5.4.0-1078.84
5.4.0-1078.84
ubuntu/linux-aws-5.11<5.11.0-1028.31~20.04.1
5.11.0-1028.31~20.04.1
ubuntu/linux-aws-5.13<5.13.0-1012.13~20.04.1
5.13.0-1012.13~20.04.1
ubuntu/linux-azure<5.4.0-1083.87
5.4.0-1083.87
ubuntu/linux-azure-5.11<5.11.0-1028.31~20.04.2
5.11.0-1028.31~20.04.2
ubuntu/linux-azure-5.13<5.13.0-1013.15~20.04.1
5.13.0-1013.15~20.04.1
ubuntu/linux-bluefield<5.4.0-1040.44
5.4.0-1040.44
ubuntu/linux-gcp<5.4.0-1078.84
5.4.0-1078.84
ubuntu/linux-gcp-5.11<5.11.0-1029.33~20.04.3
5.11.0-1029.33~20.04.3
ubuntu/linux-gcp-5.13<5.13.0-1013.16~20.04.1
5.13.0-1013.16~20.04.1
ubuntu/linux-gke<5.4.0-1074.79
5.4.0-1074.79
ubuntu/linux-gkeop<5.4.0-1046.48
5.4.0-1046.48
ubuntu/linux-hwe-5.13<5.13.0-28.31~20.04.1
5.13.0-28.31~20.04.1
ubuntu/linux-ibm<5.4.0-1026.29
5.4.0-1026.29
ubuntu/linux-iot<5.4.0-1004.6
5.4.0-1004.6
ubuntu/linux-kvm<5.4.0-1068.72
5.4.0-1068.72
ubuntu/linux-oem-5.13<5.13.0-1029.36
5.13.0-1029.36
ubuntu/linux-oem-5.14<5.14.0-1008.8
5.14.0-1008.8
ubuntu/linux-oracle<5.4.0-1076.83
5.4.0-1076.83
ubuntu/linux-oracle-5.11<5.11.0-1028.31~20.04.1
5.11.0-1028.31~20.04.1
ubuntu/linux-oracle-5.13<5.13.0-1016.20~20.04.1
5.13.0-1016.20~20.04.1
ubuntu/linux-raspi<5.4.0-1065.75
5.4.0-1065.75
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-5.11*
ubuntu/linux-hwe-5.8*
ubuntu/linux-intel-5.13*
ubuntu/linux-oem-5.10*
ubuntu/linux-oem-5.6*
ubuntu/linux-oracle-5.8*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.11*
ubuntu/linux-riscv-5.8*
ubuntu/linux-aws-fips<5.4.0-1078.84+fips1
5.4.0-1078.84+fips1
ubuntu/linux-azure-fips<5.4.0-1083.87+fips1
5.4.0-1083.87+fips1
ubuntu/linux-fips<5.4.0-1054.61
5.4.0-1054.61
ubuntu/linux-gcp-fips<5.4.0-1078.84+fips1
5.4.0-1078.84+fips1
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*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/kernel-rt to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-372.9.1.rt7.166.el8
  2. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-372.9.1.el8
  3. Upgrade

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

    Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1
  4. Upgrade

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

    Fixed in 4.4.0-1117.123
  5. Upgrade

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

    Fixed in 4.15.0-1142.156~14.04.1
  6. Upgrade

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

    Fixed in 4.4.0-239.273~14.04.1
  7. Upgrade

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

    Fixed in 4.4.0-239.273
  8. Upgrade

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

    Fixed in 4.4.0-1155.170
  9. Upgrade

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

    Fixed in 4.15.0-1133.143~16.04.1
  10. Upgrade

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

    Fixed in 4.15.0-1142.156~16.04.1
  11. Upgrade

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

    Fixed in 4.15.0-1127.142~16.04.1
  12. Upgrade

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

    Fixed in 4.15.0-184.194~16.04.1
  13. Upgrade

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

    Fixed in 4.4.0-1118.128
  14. Upgrade

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

    Fixed in 4.15.0-1098.108~16.04.1
  15. Upgrade

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

    Fixed in 4.4.0-1088.95
  16. Upgrade

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

    Fixed in 4.15.0-184.194
  17. Upgrade

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

    Fixed in 4.15.0-1133.143
  18. Upgrade

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

    Fixed in 5.4.0-1078.84~18.04.1
  19. Upgrade

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

    Fixed in 4.15.0-1142.156
  20. Upgrade

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

    Fixed in 5.4.0-1083.87~18.04.1
  21. Upgrade

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

    Fixed in 4.15.0-1047.52
  22. Upgrade

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

    Fixed in 4.15.0-1127.142
  23. Upgrade

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

    Fixed in 5.4.0-1078.84~18.04.1
  24. Upgrade

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

    Fixed in 5.4.0-1074.79~18.04.1
  25. Upgrade

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

    Fixed in 5.4.0-1046.48~18.04.1
  26. Upgrade

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

    Fixed in 5.4.0-117.132~18.04.1
  27. Upgrade

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

    Fixed in 5.4.0-1028.32~18.04.1
  28. Upgrade

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

    Fixed in 4.15.0-1119.123
  29. Upgrade

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

    Fixed in 4.15.0-1098.108
  30. Upgrade

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

    Fixed in 5.4.0-1076.83~18.04.1
  31. Upgrade

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

    Fixed in 5.4.0-1065.75~18.04.1
  32. Upgrade

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

    Fixed in 4.15.0-1114.122
  33. Upgrade

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

    Fixed in 4.15.0-1132.142
  34. Upgrade

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

    Fixed in 4.15.0-2072.76
  35. Upgrade

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

    Fixed in 4.15.0-2053.58
  36. Upgrade

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

    Fixed in 4.15.0-1090.100
  37. Upgrade

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

    Fixed in 4.15.0-2037.41
  38. Upgrade

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

    Fixed in 5.4.0-117.132
  39. Upgrade

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

    Fixed in 5.4.0-1078.84
  40. Upgrade

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

    Fixed in 5.11.0-1028.31~20.04.1
  41. Upgrade

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

    Fixed in 5.13.0-1012.13~20.04.1
  42. Upgrade

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

    Fixed in 5.4.0-1083.87
  43. Upgrade

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

    Fixed in 5.11.0-1028.31~20.04.2
  44. Upgrade

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

    Fixed in 5.13.0-1013.15~20.04.1
  45. Upgrade

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

    Fixed in 5.4.0-1040.44
  46. Upgrade

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

    Fixed in 5.4.0-1078.84
  47. Upgrade

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

    Fixed in 5.11.0-1029.33~20.04.3
  48. Upgrade

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

    Fixed in 5.13.0-1013.16~20.04.1
  49. Upgrade

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

    Fixed in 5.4.0-1074.79
  50. Upgrade

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

    Fixed in 5.4.0-1046.48
  51. Upgrade

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

    Fixed in 5.13.0-28.31~20.04.1
  52. Upgrade

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

    Fixed in 5.4.0-1026.29
  53. Upgrade

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

    Fixed in 5.4.0-1004.6
  54. Upgrade

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

    Fixed in 5.4.0-1068.72
  55. Upgrade

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

    Fixed in 5.13.0-1029.36
  56. Upgrade

    Upgrade ubuntu/linux-oem-5.14 to a version that resolves this vulnerability.

    Fixed in 5.14.0-1008.8
  57. Upgrade

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

    Fixed in 5.4.0-1076.83
  58. Upgrade

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

    Fixed in 5.11.0-1028.31~20.04.1
  59. Upgrade

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

    Fixed in 5.13.0-1016.20~20.04.1
  60. Upgrade

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

    Fixed in 5.4.0-1065.75
  61. 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
  62. Upgrade

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

    Fixed in 5.4.0-1078.84+fips1
  63. Upgrade

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

    Fixed in 5.4.0-1083.87+fips1
  64. Upgrade

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

    Fixed in 5.4.0-1054.61
  65. Upgrade

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

    Fixed in 5.4.0-1078.84+fips1
  66. Configuration

    Append `install sctp /bin/true` to `/etc/modprobe.d/disable-sctp.conf` to prevent the SCTP module from loading.

    Linux SCTP kernel module modprobe install command = install sctp /bin/true
  67. Operational

    Restart the system if the SCTP modules are currently loaded.

Event History

Sep 2, 2021
Data Sourced
via Red Hat·05:36 PM
DescriptionSeverityAffected Software
Sep 8, 2021
CVE Published
06:38 AM
Sep 9, 2021
Data Sourced
via OSV·12:00 AM
DescriptionSeverityAffected Software
Mar 2, 2022
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
DescriptionWeakness

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2021-3772?

CVE-2021-3772 is classified as a medium severity vulnerability due to its potential to disrupt existing SCTP associations.

2

How do I fix CVE-2021-3772?

To remediate CVE-2021-3772, upgrade to the recommended kernel versions provided by your Linux distribution vendor.

3

Who is affected by CVE-2021-3772?

CVE-2021-3772 affects various Linux kernel versions, specifically those prior to specified patched versions from Red Hat and Debian.

4

What type of attack does CVE-2021-3772 enable?

CVE-2021-3772 allows a blind attacker to potentially terminate existing SCTP associations through the use of malicious packets.

5

Which Linux distributions are impacted by CVE-2021-3772?

CVE-2021-3772 impacts Red Hat Enterprise Linux, Debian, and other distributions using vulnerable Linux kernel versions.

Company

Resources

Contact

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