CVE-2023-40547 Report - Details, Severity, & Advisories
Twingate Team
•
May 13, 2024
CVE-2023-40547 Report - Details, Severity, & Advisories
CVE-2023-40547 is a high-severity remote code execution vulnerability affecting Shim, a software component that provides boot support. This flaw allows attackers to compromise systems during the early boot phase by exploiting attacker-controlled values when parsing an HTTP response. Systems running Red Hat's Shim up to version 15.8 and Red Hat Enterprise Linux versions 7.0, 8.0, and 9.0 are among those affected by this vulnerability. For users not familiar with vulnerabilities, this means that certain systems can be taken over by attackers during the initial startup process if they can manipulate specific network communications.
How do I know if I'm affected?
To determine if you're affected by the CVE-2023-40547 vulnerability, you should check if your system is running Red Hat's Shim up to version 15.8 or Red Hat Enterprise Linux versions 7.0, 8.0, and 9.0. This vulnerability allows attackers to compromise systems during the early boot phase by exploiting attacker-controlled values when parsing an HTTP response. If your system is using the affected versions and is incorrectly trusting HTTP headers, it may be vulnerable to this issue.
What should I do if I'm affected?
If you're affected by the CVE-2023-40547 vulnerability, it's crucial to update your system. For Red Hat users, apply the security updates provided in the Red Hat Customer Portal and follow the instructions. For Shim users, update to version 15.8, which includes fixes for this vulnerability. Always keep your software up-to-date to minimize security risks.
Is in CISA’s Known Exploited Vulnerabilities Catalog?
The CVE-2023-40547 vulnerability is not listed in CISA's Known Exploited Vulnerabilities Catalog. This security issue, published on January 25, 2024, affects Shim, a software component that provides boot support. There is no specified due date or required action mentioned, but users are advised to update their systems and follow provided advisories and solutions to address the vulnerability.
Weakness enumeration
The weakness enumeration for this vulnerability includes two types of weaknesses: CWE-346 Origin Validation Error and CWE-787 Out-of-bounds Write. These weaknesses can lead to remote code execution, secure boot bypass, and other issues.
For more details
For a comprehensive understanding of this vulnerability, including its description, severity, technical details, and known affected software configurations, refer to the NVD page or the resources listed below.
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CVE-2023-40547 Report - Details, Severity, & Advisories
Twingate Team
•
May 13, 2024
CVE-2023-40547 Report - Details, Severity, & Advisories
CVE-2023-40547 is a high-severity remote code execution vulnerability affecting Shim, a software component that provides boot support. This flaw allows attackers to compromise systems during the early boot phase by exploiting attacker-controlled values when parsing an HTTP response. Systems running Red Hat's Shim up to version 15.8 and Red Hat Enterprise Linux versions 7.0, 8.0, and 9.0 are among those affected by this vulnerability. For users not familiar with vulnerabilities, this means that certain systems can be taken over by attackers during the initial startup process if they can manipulate specific network communications.
How do I know if I'm affected?
To determine if you're affected by the CVE-2023-40547 vulnerability, you should check if your system is running Red Hat's Shim up to version 15.8 or Red Hat Enterprise Linux versions 7.0, 8.0, and 9.0. This vulnerability allows attackers to compromise systems during the early boot phase by exploiting attacker-controlled values when parsing an HTTP response. If your system is using the affected versions and is incorrectly trusting HTTP headers, it may be vulnerable to this issue.
What should I do if I'm affected?
If you're affected by the CVE-2023-40547 vulnerability, it's crucial to update your system. For Red Hat users, apply the security updates provided in the Red Hat Customer Portal and follow the instructions. For Shim users, update to version 15.8, which includes fixes for this vulnerability. Always keep your software up-to-date to minimize security risks.
Is in CISA’s Known Exploited Vulnerabilities Catalog?
The CVE-2023-40547 vulnerability is not listed in CISA's Known Exploited Vulnerabilities Catalog. This security issue, published on January 25, 2024, affects Shim, a software component that provides boot support. There is no specified due date or required action mentioned, but users are advised to update their systems and follow provided advisories and solutions to address the vulnerability.
Weakness enumeration
The weakness enumeration for this vulnerability includes two types of weaknesses: CWE-346 Origin Validation Error and CWE-787 Out-of-bounds Write. These weaknesses can lead to remote code execution, secure boot bypass, and other issues.
For more details
For a comprehensive understanding of this vulnerability, including its description, severity, technical details, and known affected software configurations, refer to the NVD page or the resources listed below.
Rapidly implement a modern Zero Trust network that is more secure and maintainable than VPNs.
CVE-2023-40547 Report - Details, Severity, & Advisories
Twingate Team
•
May 13, 2024
CVE-2023-40547 Report - Details, Severity, & Advisories
CVE-2023-40547 is a high-severity remote code execution vulnerability affecting Shim, a software component that provides boot support. This flaw allows attackers to compromise systems during the early boot phase by exploiting attacker-controlled values when parsing an HTTP response. Systems running Red Hat's Shim up to version 15.8 and Red Hat Enterprise Linux versions 7.0, 8.0, and 9.0 are among those affected by this vulnerability. For users not familiar with vulnerabilities, this means that certain systems can be taken over by attackers during the initial startup process if they can manipulate specific network communications.
How do I know if I'm affected?
To determine if you're affected by the CVE-2023-40547 vulnerability, you should check if your system is running Red Hat's Shim up to version 15.8 or Red Hat Enterprise Linux versions 7.0, 8.0, and 9.0. This vulnerability allows attackers to compromise systems during the early boot phase by exploiting attacker-controlled values when parsing an HTTP response. If your system is using the affected versions and is incorrectly trusting HTTP headers, it may be vulnerable to this issue.
What should I do if I'm affected?
If you're affected by the CVE-2023-40547 vulnerability, it's crucial to update your system. For Red Hat users, apply the security updates provided in the Red Hat Customer Portal and follow the instructions. For Shim users, update to version 15.8, which includes fixes for this vulnerability. Always keep your software up-to-date to minimize security risks.
Is in CISA’s Known Exploited Vulnerabilities Catalog?
The CVE-2023-40547 vulnerability is not listed in CISA's Known Exploited Vulnerabilities Catalog. This security issue, published on January 25, 2024, affects Shim, a software component that provides boot support. There is no specified due date or required action mentioned, but users are advised to update their systems and follow provided advisories and solutions to address the vulnerability.
Weakness enumeration
The weakness enumeration for this vulnerability includes two types of weaknesses: CWE-346 Origin Validation Error and CWE-787 Out-of-bounds Write. These weaknesses can lead to remote code execution, secure boot bypass, and other issues.
For more details
For a comprehensive understanding of this vulnerability, including its description, severity, technical details, and known affected software configurations, refer to the NVD page or the resources listed below.
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