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CVE-2023-40547
Detail
Modified
This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
Description
A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. This flaw is only exploitable during the early boot phase, an attacker needs to perform a Man-in-the-Middle or compromise the boot server to be able to exploit this vulnerability successfully.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: The NVD and the CNA have provided the same score. When this occurs only the CNA information is displayed, but the Acceptance Level icon for the CNA is given a checkmark to signify NVD concurrence.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.
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CVE Modified by Red Hat, Inc.4/25/2024 10:15:08 AM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1902 [No types assigned]
Added
Reference
Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1903 [No types assigned]
Added
Reference
Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1959 [No types assigned]
CVE Modified by Red Hat, Inc.4/18/2024 12:15:09 AM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1873 [No types assigned]
Added
Reference
Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1876 [No types assigned]
Added
Reference
Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1883 [No types assigned]
CVE Modified by Red Hat, Inc.4/16/2024 12:15:07 PM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1834 [No types assigned]
Added
Reference
Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1835 [No types assigned]
CVE Modified by Red Hat, Inc.3/26/2024 12:15:08 PM
Action
Type
Old Value
New Value
Added
CWE
Red Hat, Inc. CWE-125
Removed
CWE
Red Hat, Inc. CWE-787
CVE Modified by Red Hat, Inc.2/19/2024 6:15:07 AM
Action
Type
Old Value
New Value
Added
CWE
Red Hat, Inc. CWE-787
Removed
CWE
Red Hat, Inc. CWE-346
Modified Analysis by NIST2/08/2024 2:25:40 PM
Action
Type
Old Value
New Value
Added
CVSS V3.1
NIST AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Removed
CVSS V3.1
NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added
CWE
NIST CWE-346
CVE Modified by Red Hat, Inc.2/08/2024 12:15:10 PM
Action
Type
Old Value
New Value
Added
CWE
Red Hat, Inc. CWE-346
CVE Modified by Red Hat, Inc.2/07/2024 12:15:09 PM
Action
Type
Old Value
New Value
Changed
Description
A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise.
A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. This flaw is only exploitable during the early boot phase, an attacker needs to perform a Man-in-the-Middle or compromise the boot server to be able to exploit this vulnerability success
Initial Analysis by NIST2/02/2024 11:53:32 AM
Action
Type
Old Value
New Value
Added
CPE Configuration
OR
*cpe:2.3:a:redhat:shim:*:*:*:*:*:*:*:* versions up to (excluding) 15.8
Added
CPE Configuration
OR
*cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
Added
CVSS V3.1
NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added
CWE
NIST CWE-787
Changed
Reference Type
http://www.openwall.com/lists/oss-security/2024/01/26/1 No Types Assigned
http://www.openwall.com/lists/oss-security/2024/01/26/1 Mailing List, Patch, Third Party Advisory
Changed
Reference Type
https://access.redhat.com/security/cve/CVE-2023-40547 No Types Assigned
Red Hat, Inc. http://www.openwall.com/lists/oss-security/2024/01/26/1 [No types assigned]
New CVE Received by NIST1/25/2024 11:15:07 AM
Action
Type
Old Value
New Value
Added
CVSS V3.1
Red Hat, Inc. AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Added
Description
A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise.
Added
Reference
Red Hat, Inc. https://access.redhat.com/security/cve/CVE-2023-40547 [No types assigned]
Added
Reference
Red Hat, Inc. https://bugzilla.redhat.com/show_bug.cgi?id=2234589 [No types assigned]
Quick Info
CVE Dictionary Entry: CVE-2023-40547 NVD
Published Date: 01/25/2024 NVD
Last Modified: 04/25/2024
Source: Red Hat, Inc.