Summary
[15.8-1.0.3]
- Update shimx64.efi and shimaa64.efi v15.8 signed by Microsoft [Orabug: 36072879]
- Update shim fb and mm binaries to match unsigned releases [Orabug: 36072879]
[15.8-1.0.2]
- Use binaries with correct shim.ol generation [Orabug: 36072879]
- Set SBAT_AUTOMATIC_DATE=2021030218 [Orabug: 36072879]
[15.8-1.0.1]
- Update to 15.8 [Orabug: 36072879]
- fix CVE-2023-40546, CVE-2023-40547, CVE-2023-40548, CVE-2023-40549, CVE-2023-40550, CVE-2023-40551 [Orabug: 36072879]
Fixed packages 2
| Release | Package | Fixed in |
|---|---|---|
| Oracle Linux · 9 | shim-aa64 | 0:15.8-1.0.3.el9 |
| Oracle Linux · 9 | shim-x64 | 0:15.8-1.0.3.el9 |
Vulnerabilities 6
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High 8.3
Shim: rce in http boot support may lead to secure boot bypass
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-…
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High 7.4
Shim: interger overflow leads to heap buffer overflow in verify_sbat_section on 32-bits systems
A buffer overflow was found in Shim in the 32-bit system. The overflow happens due to an addition operation involving a user-controlled value parsed from the PE binary being used by Shim. This value is further used for memory allocation operations, leading to…
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Medium 6.2
Shim: out-of-bounds read printing error messages
A flaw was found in Shim when an error happened while creating a new ESL variable. If Shim fails to create the new variable, it tries to print an error message to the user; however, the number of parameters used by the logging function doesn't match the forma…
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Medium 6.2
Shim: out-of-bounds read in verify_buffer_authenticode() malformed pe file
An out-of-bounds read flaw was found in Shim due to the lack of proper boundary verification during the load of a PE binary. This flaw allows an attacker to load a crafted PE binary, triggering the issue and crashing Shim, resulting in a denial of service.
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Medium 5.5
Shim: out-of-bound read in verify_buffer_sbat()
An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue may expose sensitive data during the system's boot phase.
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Medium 5.1
Shim: out of bounds read when parsing mz binaries
A flaw was found in the MZ binary format in Shim. An out-of-bounds read may occur, leading to a crash or possible exposure of sensitive data during the system's boot phase.