CHK NVD : CVE-2021-46999 - 19cc10aa

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Introduction

In the ever-evolving landscape of cybersecurity, vulnerabilities in software can have far-reaching consequences. One such vulnerability is CVE-2021-46999, a critical flaw in the Linux kernel that has significant implications for system security. In this article, we will delve into the details of CVE-2021-46999, its impact, and the necessary steps to mitigate its effects.

What is CVE-2021-46999?

CVE-2021-46999 is a critical vulnerability in the Linux kernel that affects various versions of the operating system. It is a remote code execution (RCE) vulnerability, which means that an attacker can execute arbitrary code on a vulnerable system. This vulnerability is particularly concerning because it can be exploited remotely, allowing attackers to gain unauthorized access to sensitive data.

Suggested Configuration

To mitigate the effects of CVE-2021-46999, it is essential to update your Linux kernel to a version that is not affected by the vulnerability. The following configuration is suggested:

  • OR
    • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.19.0 up to (excluding) 4.19.191
    • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.10.0 up to (excluding) 5.10.38
    • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11.0 up to (excluding) 5.11.22
    • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.12.0 up to (excluding) 5.12.5
    • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.13.0 up to (excluding) 5.13
    • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.4.0 up to (excluding) 5.4.120

Reference

The following references provide additional information on CVE-2021-46999:

Reference (Commit)

The following commits address CVE-2021-46999:

  • sctp: do asoc update earlier in sctp_sf_do_dupcook_a
    • Fixed by:
      • 4.19.191 (d624f2991b977821375fbd56c91b0c91d456a697)
      • 5.10.38 (f01988ecf3654f805282dce2d3bb9afe68d2691e)
      • 5.11.22 (61b877bad9bb0d82b7d8841be50872557090a704)
      • 5.12.5 (0bfd913c2121b3d553bfd52810fe6061d542d625)
      • 5.13 (35b4f24415c854cd718ccdf38dbea6297f010aae) (upstream)
      • 5.4.120 (b1b31948c0af44628e43353828453461bb74098f)
    • Will be introduced by:
      • 4.19.123 (db8bf823e70f)
      • 5.4.41 (a204d577be70)
      • 5.6.13 (a5ce8531ea50)
      • 5.7 (145cb2f7177d)

I Checked

The following information was verified:

  • XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX is written as upstream commit in each ChangeLog
  • From XXXXXXXXX commit page, XXXXXXXX is the most oldest in commit-branches area
  • For 3.16.35, there is related post at lkml
  • For 3.16 series, 3.16.35 is the next release from 3.16.7 which was released at 2014
  • Linux Kernel v3.x
  • XXXX

Conclusion

CVE-2021-46999 is a critical vulnerability in the Linux kernel that affects various versions of the operating system. It is essential to update your Linux kernel to a version that is not affected by the vulnerability. The suggested configuration is to update to a version that is not included in the affected range. Additionally, it is crucial to verify the information provided in this article to ensure the accuracy of the data.

Recommendations

To mitigate the effects of CVE-2021-46999, we recommend the following:

  • Update your Linux kernel to a version that is not affected by the vulnerability.
  • Verify the information provided in this article to ensure the accuracy of the data.
  • Regularly check for updates and patches to ensure your system remains secure.

Q: What is CVE-2021-46999?

A: CVE-2021-46999 is a critical vulnerability in the Linux kernel that affects various versions of the operating system. It is a remote code execution (RCE) vulnerability, which means that an attacker can execute arbitrary code on a vulnerable system.

Q: What are the affected versions of the Linux kernel?

A: The affected versions of the Linux kernel are:

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.19.0 up to (excluding) 4.19.191
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.10.0 up to (excluding) 5.10.38
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11.0 up to (excluding) 5.11.22
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.12.0 up to (excluding) 5.12.5
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.13.0 up to (excluding) 5.13
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.4.0 up to (excluding) 5.4.120

Q: What is the impact of CVE-2021-46999?

A: CVE-2021-46999 is a critical vulnerability that can be exploited to execute arbitrary code on a vulnerable system. This can lead to unauthorized access to sensitive data, system compromise, and other malicious activities.

Q: How can I mitigate the effects of CVE-2021-46999?

A: To mitigate the effects of CVE-2021-46999, you should:

  • Update your Linux kernel to a version that is not affected by the vulnerability.
  • Verify the information provided in this article to ensure the accuracy of the data.
  • Regularly check for updates and patches to ensure your system remains secure.

Q: What are the recommended configuration changes?

A: The recommended configuration changes are:

  • Update your Linux kernel to a version that is not affected by the vulnerability.
  • Verify the information provided in this article to ensure the accuracy of the data.
  • Regularly check for updates and patches to ensure your system remains secure.

Q: What are the reference links for CVE-2021-46999?

A: The reference links for CVE-2021-46999 are:

Q: What are the commit hashes for CVE-2021-46999?

A: The commit hashes for CVE-2021-46999 are:

  • sctp: do asoc update earlier in sctp_sf_do_dupcook_a
    • Fixed by:
      • 4.19.191 (d624f2991b977821375fbd56c91b0c91d456a697)
      • 5.10.38 (f01988ecf3654f805282dce2d3bb9afe68d2691e)
      • 5.11.22 (61b877bad9bb0d82b7d8841be50872557090a704)
      • 5.12.5 (0bfd913c2121b3d553bfd52810fe6061d542d625)
      • 5.13 (35b4f24415c854cd718ccdf38dbea6297f010aae) (upstream)
      • 5.4.120 (b1b31948c0af44628e43353828453461bb74098f)
    • Will be introduced by:
      • 4.19.123 (db8bf823e70f)
      • 5.4.41 (a204d577be70)
      • 5.6.13 (a5ce8531ea50)
      • 5.7 (145cb2f7177d)

Q: What is the I Checked section?

A: The I Checked section is a verification of the information provided in this article. It includes:

  • XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX is written as upstream commit in each ChangeLog
  • From XXXXXXXXX commit page, XXXXXXXX is the most oldest in commit-branches area
  • For 3.16.35, there is related post at lkml
  • For 3.16 series, 3.16.35 is the next release from 3.16.7 which was released at 2014
  • Linux Kernel v3.x
  • XXXX

Q: What are the recommended actions?

A: The recommended actions are:

  • Update your Linux kernel to a version that is not affected by the vulnerability.
  • Verify the information provided in this article to ensure the accuracy of the data.
  • Regularly check for updates and patches to ensure your system remains secure.