CVE-2021-42739: Buffer Overflow

Published Apr 20, 2021
·
Updated

A heap-based buffer overflow flaw was found in the Linux kernel FireDTV media card driver, where the user calls the CASENDMSG ioctl. This flaw allows a local user of the host machine to crash the system or escalate privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Other sources

The firewire subsystem in the Linux kernel through 5.14.13 has a buffer overflow related to drivers/media/firewire/firedtv-avc.c and drivers/media/firewire/firedtv-ci.c, because avccapmt mishandles bounds checking.

— Launchpad

Affected Software

113 affected componentsFixes available
redhat/kernel<3.10.0
3.10.0
Linux Linux kernel<=5.14.13
Fedoraproject Fedora=33
Fedoraproject Fedora=34
Fedoraproject Fedora=35
Debian Debian Linux=9.0
Starwindsoftware Starwind San \& Nas=v8r12
Starwindsoftware Starwind Virtual San=v8r13-14338
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
ubuntu/linux-aws<4.4.0-1103.108
4.4.0-1103.108
ubuntu/linux-azure<4.15.0-1130.143~14.04.1
4.15.0-1130.143~14.04.1
ubuntu/linux-lts-xenial<4.4.0-223.256~14.04.1
4.4.0-223.256~14.04.1
ubuntu/linux*
ubuntu/linux<4.4.0-223.256
4.4.0-223.256
ubuntu/linux-aws<4.4.0-1139.153
4.4.0-1139.153
ubuntu/linux-aws-hwe<4.15.0-1119.126~16.04.2
4.15.0-1119.126~16.04.2
ubuntu/linux-azure<4.15.0-1130.143~16.04.1
4.15.0-1130.143~16.04.1
ubuntu/linux-gcp<4.15.0-1115.129~16.04.1
4.15.0-1115.129~16.04.1
ubuntu/linux-hwe<4.15.0-167.175~16.04.1
4.15.0-167.175~16.04.1
ubuntu/linux-kvm<4.4.0-1104.113
4.4.0-1104.113
ubuntu/linux-oracle<4.15.0-1086.94~16.04.1
4.15.0-1086.94~16.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux-fips<4.4.0-1073.79
4.4.0-1073.79
ubuntu/linux-fips*
ubuntu/linux<4.15.0-167.175
4.15.0-167.175
ubuntu/linux-aws<4.15.0-1119.127
4.15.0-1119.127
ubuntu/linux-aws-5.4<5.4.0-1064.67~18.04.1
5.4.0-1064.67~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1131.144
4.15.0-1131.144
ubuntu/linux-azure-5.4<5.4.0-1068.71~18.04.1
5.4.0-1068.71~18.04.1
ubuntu/linux-dell300x<4.15.0-1034.39
4.15.0-1034.39
ubuntu/linux-gcp-4.15<4.15.0-1115.129
4.15.0-1115.129
ubuntu/linux-gcp-5.4<5.4.0-1063.67~18.04.1
5.4.0-1063.67~18.04.1
ubuntu/linux-gke-5.4<5.4.0-1061.64~18.04.1
5.4.0-1061.64~18.04.1
ubuntu/linux-gkeop-5.4<5.4.0-1032.33~18.04.1
5.4.0-1032.33~18.04.1
ubuntu/linux-hwe-5.4<5.4.0-97.110~18.04.1
5.4.0-97.110~18.04.1
ubuntu/linux-ibm-5.4<5.4.0-1014.15~18.04.1
5.4.0-1014.15~18.04.1
ubuntu/linux-kvm<4.15.0-1106.108
4.15.0-1106.108
ubuntu/linux-oracle<4.15.0-1086.94
4.15.0-1086.94
ubuntu/linux-oracle-5.4<5.4.0-1062.66~18.04.1
5.4.0-1062.66~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1052.58~18.04.1
5.4.0-1052.58~18.04.1
ubuntu/linux-raspi2<4.15.0-1102.109
4.15.0-1102.109
ubuntu/linux-snapdragon<4.15.0-1119.128
4.15.0-1119.128
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-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<4.15.0-2060.62
4.15.0-2060.62
ubuntu/linux-azure-fips<4.15.0-2042.46
4.15.0-2042.46
ubuntu/linux-fips<4.15.0-1076.85
4.15.0-1076.85
ubuntu/linux-gcp-fips<4.15.0-2025.27
4.15.0-2025.27
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-97.110
5.4.0-97.110
ubuntu/linux-aws<5.4.0-1064.67
5.4.0-1064.67
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<5.4.0-1068.71
5.4.0-1068.71
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<5.4.0-1026.29
5.4.0-1026.29
ubuntu/linux-gcp<5.4.0-1063.67
5.4.0-1063.67
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<5.4.0-1061.64
5.4.0-1061.64
ubuntu/linux-gkeop<5.4.0-1032.33
5.4.0-1032.33
ubuntu/linux-hwe-5.13<5.13.0-28.31~20.04.1
5.13.0-28.31~20.04.1
ubuntu/linux-ibm<5.4.0-1013.14
5.4.0-1013.14
ubuntu/linux-kvm<5.4.0-1054.56
5.4.0-1054.56
ubuntu/linux-oem-5.10<5.10.0-1053.55
5.10.0-1053.55
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<5.4.0-1062.66
5.4.0-1062.66
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<5.4.0-1052.58
5.4.0-1052.58
ubuntu/linux-aws-5.8*
ubuntu/linux-azure-5.8*
ubuntu/linux-gcp-5.8*
ubuntu/linux-hwe-5.11*
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-5.11*
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<5.4.0-1041.47
5.4.0-1041.47
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 to a version that resolves this vulnerability.

    Fixed in 3.10.0
  2. Upgrade

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

    Fixed in 4.4.0-1103.108
  3. Upgrade

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

    Fixed in 4.15.0-1130.143~14.04.1
  4. Upgrade

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

    Fixed in 4.4.0-223.256~14.04.1
  5. Upgrade

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

    Fixed in 4.4.0-223.256
  6. Upgrade

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

    Fixed in 4.4.0-1139.153
  7. Upgrade

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

    Fixed in 4.15.0-1119.126~16.04.2
  8. Upgrade

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

    Fixed in 4.15.0-1130.143~16.04.1
  9. Upgrade

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

    Fixed in 4.15.0-1115.129~16.04.1
  10. Upgrade

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

    Fixed in 4.15.0-167.175~16.04.1
  11. Upgrade

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

    Fixed in 4.4.0-1104.113
  12. Upgrade

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

    Fixed in 4.15.0-1086.94~16.04.1
  13. Upgrade

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

    Fixed in 4.4.0-1073.79
  14. Upgrade

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

    Fixed in 4.15.0-167.175
  15. Upgrade

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

    Fixed in 4.15.0-1119.127
  16. Upgrade

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

    Fixed in 5.4.0-1064.67~18.04.1
  17. Upgrade

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

    Fixed in 4.15.0-1131.144
  18. Upgrade

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

    Fixed in 5.4.0-1068.71~18.04.1
  19. Upgrade

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

    Fixed in 4.15.0-1034.39
  20. Upgrade

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

    Fixed in 4.15.0-1115.129
  21. Upgrade

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

    Fixed in 5.4.0-1063.67~18.04.1
  22. Upgrade

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

    Fixed in 5.4.0-1061.64~18.04.1
  23. Upgrade

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

    Fixed in 5.4.0-1032.33~18.04.1
  24. Upgrade

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

    Fixed in 5.4.0-97.110~18.04.1
  25. Upgrade

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

    Fixed in 5.4.0-1014.15~18.04.1
  26. Upgrade

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

    Fixed in 4.15.0-1106.108
  27. Upgrade

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

    Fixed in 4.15.0-1086.94
  28. Upgrade

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

    Fixed in 5.4.0-1062.66~18.04.1
  29. Upgrade

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

    Fixed in 5.4.0-1052.58~18.04.1
  30. Upgrade

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

    Fixed in 4.15.0-1102.109
  31. Upgrade

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

    Fixed in 4.15.0-1119.128
  32. Upgrade

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

    Fixed in 4.15.0-2060.62
  33. Upgrade

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

    Fixed in 4.15.0-2042.46
  34. Upgrade

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

    Fixed in 4.15.0-1076.85
  35. Upgrade

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

    Fixed in 4.15.0-2025.27
  36. Upgrade

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

    Fixed in 5.4.0-97.110
  37. Upgrade

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

    Fixed in 5.4.0-1064.67
  38. Upgrade

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

    Fixed in 5.11.0-1028.31~20.04.1
  39. Upgrade

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

    Fixed in 5.13.0-1012.13~20.04.1
  40. Upgrade

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

    Fixed in 5.4.0-1068.71
  41. Upgrade

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

    Fixed in 5.11.0-1028.31~20.04.2
  42. Upgrade

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

    Fixed in 5.13.0-1013.15~20.04.1
  43. Upgrade

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

    Fixed in 5.4.0-1026.29
  44. Upgrade

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

    Fixed in 5.4.0-1063.67
  45. Upgrade

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

    Fixed in 5.11.0-1029.33~20.04.3
  46. Upgrade

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

    Fixed in 5.13.0-1013.16~20.04.1
  47. Upgrade

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

    Fixed in 5.4.0-1061.64
  48. Upgrade

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

    Fixed in 5.4.0-1032.33
  49. Upgrade

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

    Fixed in 5.13.0-28.31~20.04.1
  50. Upgrade

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

    Fixed in 5.4.0-1013.14
  51. Upgrade

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

    Fixed in 5.4.0-1054.56
  52. Upgrade

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

    Fixed in 5.10.0-1053.55
  53. Upgrade

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

    Fixed in 5.13.0-1029.36
  54. Upgrade

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

    Fixed in 5.14.0-1008.8
  55. Upgrade

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

    Fixed in 5.4.0-1062.66
  56. Upgrade

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

    Fixed in 5.11.0-1028.31~20.04.1
  57. Upgrade

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

    Fixed in 5.13.0-1016.20~20.04.1
  58. Upgrade

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

    Fixed in 5.4.0-1052.58
  59. Upgrade

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

    Fixed in 5.4.0-1069.73+fips2
  60. Upgrade

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

    Fixed in 5.4.0-1073.76+fips1
  61. Upgrade

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

    Fixed in 5.4.0-1041.47
  62. Upgrade

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

    Fixed in 5.4.0-1067.71~20.04.1
  63. 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

Oct 20, 2021
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via OSV·07:15 AM
DescriptionSeverityAffected Software

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-2021-42739?

CVE-2021-42739 has a high severity rating due to its potential to enable privilege escalation and system crashes.

2

How do I fix CVE-2021-42739?

To mitigate CVE-2021-42739, you should update to the fixed versions of the Linux kernel, specifically 5.10.223-1, 5.10.226-1, 6.1.123-1, 6.1.128-1, 6.12.12-1, or 6.12.13-1.

3

Which systems are affected by CVE-2021-42739?

CVE-2021-42739 affects various distributions of the Linux kernel, specifically versions up to 5.14.13 and kernel packages from Red Hat and Debian.

4

Can CVE-2021-42739 be exploited remotely?

CVE-2021-42739 is a local vulnerability, meaning that exploitation requires a local user to have access to the host system.

5

What are the consequences of exploiting CVE-2021-42739?

Exploiting CVE-2021-42739 may lead to privilege escalation, allowing an attacker to gain elevated permissions and potentially take control of the system.

Company

Resources

Contact

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