{
  "affected": [],
  "aliases": [
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    "github_reviewed_at": null,
    "nvd_published_at": "2022-11-09T22:15:00Z",
    "severity": "MODERATE"
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  "details": "BitLocker Security Feature Bypass Vulnerability.",
  "id": "GHSA-859v-858p-559v",
  "modified": "2022-11-10T12:01:09Z",
  "published": "2022-11-10T12:01:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-41099"
    },
    {
      "type": "WEB",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41099"
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{
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        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
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      {
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        "text": "Required. The vulnerability documented by this CVE requires customer action to resolve.",
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        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
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        {
          "category": "faq",
          "text": "A successful attacker could bypass the BitLocker Device Encryption feature on the system storage device. An attacker with physical access to the target could exploit this vulnerability to gain access to encrypted data.",
          "title": "What kind of security feature could be bypassed by successfully exploiting this vulnerability?"
        },
        {
          "category": "faq",
          "text": "Yes. You must apply the applicable Windows security update to your Windows Recovery Environment (WinRE). For more information about how to apply the WinRE update, see Add an update package to Windows RE.\nIMPORTANT: End users and enterprises who are updating Windows devices which are already deployed in their environment can instead use the latest Windows Safe OS Dynamic Updates to update WinRE when the partition is too small to install the full Windows update. You can download the latest Windows Safe OS Dynamic Update from the Microsoft Update Catalog.",
          "title": "Are there additional steps that I need to take to be protected from this vulnerability?"
        },
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          "text": "No. The exploit is only possible with the winre.wim on the recovery partition of the device.",
          "title": "Can a bootable Windows ISO or USB flash drive that boot to Windows RE be used to exploit this vulnerability?"
        },
        {
          "category": "faq",
          "text": "No. A BitLocker encrypted drive cannot be accessed via an arbitrary WinRE WIM file hosted on an external drive. Please complete all steps in [Microsoft Learn | Add an Update to Windows RE | Apply the update to a running PC  to ensure that the updated Windows RE image is turned on and correctly configured for your Windows installation.",
          "title": "Can a vulnerable version of WinRE WIM file be used to exploit this vulnerability?"
        },
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          "text": "No. To exploit the vulnerability the attacker needs to know the TPM PIN if the user is protected by the BitLocker TPM+PIN.",
          "title": "If TPM+PIN BitLocker protectors are being used, can the vulnerability be exploited if the attacker does not know the TPM PIN?"
        },
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          "text": "Yes. Microsoft has developed a sample script that can help you automate updating WinRE from the running Windows OS. Please see KB5025175: Updating the WinRE partition on deployed devices to address security vulnerabilities in\u202fCVE-2022-41099 for more information.",
          "title": "Is there a way I can automate the process of updating WinRE on my Windows devices which have already been deployed?"
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