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CVE-2024-20666

Medium Severity
Microsoft
SVRS
30/100

CVSSv3
NA/10

EPSS
0.15381/1

CVE-2024-20666 is a BitLocker security feature bypass vulnerability. This vulnerability allows an attacker to circumvent BitLocker encryption on affected systems, potentially exposing sensitive data. While the CVSS score is 0, indicating a base score of low severity, the SOCRadar Vulnerability Risk Score (SVRS) of 30 and the "In The Wild" tag suggest a more nuanced risk assessment. The presence of active exploits indicates that attackers are actively attempting to exploit this vulnerability, even if the technical severity is considered low. Successfully exploiting CVE-2024-20666 could lead to unauthorized access to encrypted data and compromise the confidentiality of sensitive information. Organizations should investigate the vulnerability and apply any available mitigations to reduce their risk. Although SVRS is less than 80, since there are active exploits in the wild, it may be worth monitoring. This highlights the importance of considering real-world threat intelligence alongside traditional scoring systems when prioritizing vulnerability remediation.

In The Wild
2024-01-09

2024-06-11
Eye Icon
SOCRadar
AI Insight

Description:

CVE-2024-20666 is a vulnerability in BitLocker, a full-disk encryption feature in Windows, that allows attackers to bypass security features and potentially access encrypted data. The vulnerability stems from an issue in the way BitLocker handles certain encryption keys, enabling unauthorized individuals to bypass the normal authentication process and gain access to sensitive information.

Key Insights:

  1. Severity: The SOCRadar Vulnerability Risk Score (SVRS) for CVE-2024-20666 is 36, indicating a moderate risk level. While not as critical as vulnerabilities with SVRS scores above 80, it still warrants attention and appropriate mitigation measures.

  2. Active Exploitation: There are reports of active exploits in the wild, indicating that malicious actors are actively targeting systems vulnerable to CVE-2024-20666. This underscores the urgency for organizations to prioritize patching and implementing necessary security controls.

  3. CISA Warning: The Cybersecurity and Infrastructure Security Agency (CISA) has issued a warning regarding CVE-2024-20666, emphasizing the need for immediate action to address the vulnerability. This serves as an official confirmation of the severity and potential impact of the vulnerability.

Mitigation Strategies:

  1. Apply Software Updates: Organizations should prioritize installing the latest security updates and patches provided by Microsoft to address CVE-2024-20666. This is the most effective way to mitigate the vulnerability and protect systems from potential exploitation.

  2. Enable Enhanced Security Features: Organizations should consider enabling additional security features within BitLocker, such as two-factor authentication or hardware-based encryption keys, to further enhance the security of encrypted data.

  3. Implement Network Segmentation: Implementing network segmentation can help contain the impact of a potential breach by limiting the attacker's access to specific network segments, preventing lateral movement and minimizing the potential damage.

  4. Conduct Regular Security Audits: Organizations should conduct regular security audits to identify and address any vulnerabilities or misconfigurations that could be exploited by attackers. This proactive approach helps maintain a strong security posture and minimize the risk of successful cyberattacks.

Additional Information:

If users have additional queries regarding this incident, they can use the 'Ask to Analyst' feature, contact SOCRadar directly, or open a support ticket for more information if necessary.

Indicators of Compromise

No IOCs found for this CVE

Exploits

TitleSoftware LinkDate
nomi-sec/PoC-in-GitHubhttps://github.com/nomi-sec/PoC-in-GitHub2019-12-08
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News

The January 2024 Security Update Review
Dustin Childs2024-01-09
The January 2024 Security Update Review | Welcome to the first patch Tuesday of 2024. As expected, Microsoft and Adobe have released their latest security patches. Take a break from your other activities and join us as we review the details of their latest advisories. If you’d rather watch the video recap, you can check it out here: Adobe Patches for January 2024For January, Adobe released a single patch addressing six CVEs in <a
cve-2024-21307
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cve-2024-20696

Social Media

@guelfoalexander @LetheForgot @SwiftOnSecurity If all you're doing is booting into safe mode, where you still need creds I don't *think* so? I believe the WinRE partition is protected so if you modify it, the bootloader will refuse to load it without the recovery key. This is part of why patching CVE-2024-20666 is hard.
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@LetheForgot @guelfoalexander @SwiftOnSecurity Had to learn about some of this the hard way dealing with firmware updates in the old days, and dealing with patching CVE-2024-20666 more recently. Patching WinRE turns out to be harder than it looks.
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BitLocker Secure Boot bypass vulnerability that is being tracked under ID "CVE-2024-20666." Microsoft said that the security flaw could allow threat actors to bypass BitLocker encryption if they managed to get physical access to an unpatched PC. https://t.co/3tdJmsv6v9
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#NationalSecurity #BreakingNews ID "CVE-2024-20666" @Microsoft said that the security flaw could allow threat actors to bypass BitLocker encryption if they managed to get physical access to an unpatched PC https://t.co/Pit4B6fcsv @satyanadella @Microsoft @BlackRock @DeptofDefense https://t.co/0XLbcLrnKH
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January 2024 Patch Tuesday to fix CVE-2024-20666, a BitLocker encryption bypass vulnerability that allows attackers to access encrypted data. The issue impacts Windows 10 21H2/22H2 (KB5034441), Windows 11 21H2 (KB5034440), and Windows Server 2022 (KB5034439).
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Affected Software

Configuration 1
TypeVendorProduct
OSMicrosoftwindows_10_1507
OSMicrosoftwindows_10_1607
OSMicrosoftwindows_11_21h2
OSMicrosoftwindows_11_23h2
OSMicrosoftwindows_10_1809
OSMicrosoftwindows_11_22h2
OSMicrosoftwindows_10_21h2
OSMicrosoftwindows_10_22h2
OSMicrosoftwindows_server_2022
OSMicrosoftwindows_server_2019
OSMicrosoftwindows_server_2016

References

ReferenceLink
[email protected]https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-20666

CWE Details

CWE IDCWE NameDescription
CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

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