Microsoft Patches for CVE-2021-24074 and CVE-2021-24094

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John Ives

Summary

This month Microsoft released patches for multiple serious vulnerabilities in the Windows TCP/IP network stack (including CVE-2021-24074, CVE-2021-24094)[1,2]. These vulnerabilities can allow for remote code execution. Additionally, Microsoft appears to have released patches for Windows 7 and Windows Server 2008 which are officially no longer supported.

Impact

An attacker who successfully exploits these vulnerability may be able to execute arbitrary code on the target system. If code execution is achieved, an attacker could then install programs; view, change, or delete data; or create new accounts.

Current Mitigations

  • Windows servers managed by the Windows Team will be patched by that team.
  • Berkeley Desktop systems running Windows 8.1 and above will automatically be updated and prompt users for a reboot.
  • Systems using BigFix for patch management on Windows 8.1 and above are being patched automatically and the patch will be implimented over the next couple of days.

Vulnerable

  • Microsoft Windows 7 and above

  • Microsoft Windows Server 2008 and above

Recommendations

  •  If you can patch the vulnerability, please do so.

  • If you are running Windows 7 or Windows Server 2008 confirm that the proper patches are downloaded and applied. [3,4]

  • If prompted for a reboot because of patches, please do so at the earliest opportune time.

  • If immediate patching is not an option see the Workarounds for each of these issues. [5,6]

  • Notify security@berkeley.edu if you anticipate any delays.

References