CVE-2021-3744: Medium severity Linux Linux kernel vulnerability

Published Aug 20, 2021
·
Updated

A flaw was found in the Linux kernel. A memory leak in the ccp-ops crypto driver can allow attackers to cause a denial of service. This vulnerability is similar with the older CVE-2019-18808. The highest threat from this vulnerability is to system availability.

Other sources

A memory leak flaw was found in the Linux kernel in the ccprunaesgcmcmd() function in drivers/crypto/ccp/ccp-ops.c, which allows attackers to cause a denial of service (memory consumption). This vulnerability is similar with the older CVE-2019-18808.

A memory leak in the ccprunaesgcmcmd() function in drivers/crypto/ccp/ccp-ops.c in the Linux kernel allows attackers to cause a denial of service (memory consumption).

The patch for this one fixes: 1) If we ccpinitdata() fails for &src then we need to free aad. Use goto eaad instead of goto ectx. 2) The label to free the &finalwa was named incorrectly as "etag" but it should have been "efinalwa". One error path leaked &finalwa. 3) The &tag was leaked on one error path. In that case, I added a free before the goto because the resource was local to that block.

This vulnerability is similar with the older CVE-2019-18808.

Reference: https://seclists.org/oss-sec/2021/q3/164

— Red Hat

Affected Software

126 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
Linux Linux kernel=5.15
Linux Linux kernel=5.15-rc1
Linux Linux kernel=5.15-rc2
Linux Linux kernel=5.15-rc3
Fedoraproject Fedora=33
Fedoraproject Fedora=34
Fedoraproject Fedora=35
Debian Debian Linux=9.0
Debian Debian Linux=10.0
redhat Build Of Quarkus=2.0
redhat Codeready Linux Builder=8.0
redhat Codeready Linux Builder Eus=8.6
redhat Codeready Linux Builder For Power Little Endian=8.0
redhat Codeready Linux Builder For Power Little Endian Eus=8.6
redhat Developer Tools=1.0
redhat Enterprise Linux Eus=8.6
redhat Enterprise Linux For Ibm Z Systems Eus=8.6
redhat Enterprise Linux For Power Little Endian Eus=8.6
redhat Enterprise Linux For Real Time=8
redhat Enterprise Linux For Real Time=8.6
redhat Enterprise Linux For Real Time For Nfv=8
redhat Enterprise Linux For Real Time For Nfv Tus=8.6
redhat Enterprise Linux Server Eus=8.6
redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions=8.6
redhat Enterprise Linux Server Tus=8.6
redhat Enterprise Linux Server Update Services For Sap Solutions=8.6
All of the following
redhat Virtualization Host=4.0
redhat Enterprise Linux=8.0
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
redhat Virtualization Host=4.0
redhat Enterprise Linux=8.0
ubuntu/linux-azure<4.15.0-1127.140~14.04.1
4.15.0-1127.140~14.04.1
ubuntu/linux-aws-hwe<4.15.0-1116.123~16.04.1
4.15.0-1116.123~16.04.1
ubuntu/linux-azure<4.15.0-1127.140~16.04.1
4.15.0-1127.140~16.04.1
ubuntu/linux-gcp<4.15.0-1112.126~16.04.1
4.15.0-1112.126~16.04.1
ubuntu/linux-hwe<4.15.0-163.171~16.04.1
4.15.0-163.171~16.04.1
ubuntu/linux-oracle<4.15.0-1084.92~16.04.1
4.15.0-1084.92~16.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux<4.15.0-163.171
4.15.0-163.171
ubuntu/linux-aws<4.15.0-1116.123
4.15.0-1116.123
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<4.15.0-1127.140
4.15.0-1127.140
ubuntu/linux-azure-5.4<5.4.0-1064.67~18.04.1
5.4.0-1064.67~18.04.1
ubuntu/linux-dell300x<4.15.0-1031.36
4.15.0-1031.36
ubuntu/linux-gcp-4.15<4.15.0-1112.126
4.15.0-1112.126
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<4.15.0-1103.105
4.15.0-1103.105
ubuntu/linux-oracle<4.15.0-1084.92
4.15.0-1084.92
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<4.15.0-1099.106
4.15.0-1099.106
ubuntu/linux-snapdragon<4.15.0-1116.125
4.15.0-1116.125
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<4.15.0-2057.59
4.15.0-2057.59
ubuntu/linux-azure-fips<4.15.0-2039.43
4.15.0-2039.43
ubuntu/linux-fips<4.15.0-1073.82
4.15.0-1073.82
ubuntu/linux-gcp-fips<4.15.0-2022.24
4.15.0-2022.24
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-oem-5.14<5.14.0-1007.7
5.14.0-1007.7
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-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*
debian/linux
6.1.176-16.1.190-16.12.107-16.12.116-17.2.15-17.3.4-1

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

    Fixed in 4.15.0-1127.140~14.04.1
  4. Upgrade

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

    Fixed in 4.15.0-1116.123~16.04.1
  5. Upgrade

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

    Fixed in 4.15.0-1127.140~16.04.1
  6. Upgrade

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

    Fixed in 4.15.0-1112.126~16.04.1
  7. Upgrade

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

    Fixed in 4.15.0-163.171~16.04.1
  8. Upgrade

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

    Fixed in 4.15.0-1084.92~16.04.1
  9. Upgrade

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

    Fixed in 4.15.0-163.171
  10. Upgrade

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

    Fixed in 4.15.0-1116.123
  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 4.15.0-1127.140
  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 4.15.0-1031.36
  15. Upgrade

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

    Fixed in 4.15.0-1112.126
  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 4.15.0-1103.105
  21. Upgrade

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

    Fixed in 4.15.0-1084.92
  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 4.15.0-1099.106
  25. Upgrade

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

    Fixed in 4.15.0-1116.125
  26. Upgrade

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

    Fixed in 4.15.0-2057.59
  27. Upgrade

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

    Fixed in 4.15.0-2039.43
  28. Upgrade

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

    Fixed in 4.15.0-1073.82
  29. Upgrade

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

    Fixed in 4.15.0-2022.24
  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-oem-5.14 to a version that resolves this vulnerability.

    Fixed in 5.14.0-1007.7
  47. Upgrade

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

    Fixed in 5.4.0-1058.62
  48. Upgrade

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

    Fixed in 5.11.0-1022.23~20.04.1
  49. Upgrade

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

    Fixed in 5.4.0-1047.52
  50. Upgrade

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

    Fixed in 5.11.0-1023.24~20.04.1
  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 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 6.12.116-1Fixed in 7.2.15-1Fixed in 7.3.4-1

Event History

Aug 20, 2021
CVE Published
12:00 AM
Sep 2, 2021
Data Sourced
via Red Hat·02:23 PM
DescriptionSeverityAffected Software
Sep 15, 2021
Data Sourced
via OSV·12:00 AM
DescriptionSeverityAffected Software
Mar 4, 2022
CVE Published
via MITRE·03:55 PM
Data Sourced
via MITRE·03:55 PM
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-2021-3744?

CVE-2021-3744 has a high severity rating because it can lead to denial of service due to a memory leak in the Linux kernel.

2

How do I fix CVE-2021-3744?

To fix CVE-2021-3744, update to the recommended kernel versions specified by your Linux distribution vendor.

3

Which software versions are affected by CVE-2021-3744?

CVE-2021-3744 affects multiple versions of the Linux kernel, including Kernel-RT and standard kernels up to certain releases.

4

Can CVE-2021-3744 be exploited remotely?

CVE-2021-3744 primarily affects system availability and can potentially be exploited remotely by attackers.

5

What is the impact of CVE-2021-3744 on system performance?

CVE-2021-3744 can cause system performance degradation and unavailability due to memory leaks leading to denial of service.

Company

Resources

Contact

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