HIGH 8.2 Microsoft
CVE-2020-25632
A flaw was found in grub2 in versions prior to 2.06. The rmmod implementation allows the unloading of a module used as a dependency without checking if any other dependent module is still loaded leading to a use-after-free scenario. This could allow arbitrary code to be executed or a bypass of Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Microsoft Security Update 2021-Mar: A flaw was found in grub2 in versions prior to 2.06. The rmmod implementation allows the unloading of a module used as a dependency without checking if any other dependent module is still loaded leading to a use-after-free scenario. This could allow arbitrary code to be executed or a bypass of Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Affected Products
- cm1 grub2 2.06~rc1-4 on CBL Mariner 1.0
- cbl2 grub2 2.06~rc1-7 on CBL Mariner 2.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-25632
- https://nvd.nist.gov/vuln/detail/CVE-2020-25632
This high severity vulnerability with a CVSS score of 8.2 was published on 2021-03-09 via Microsoft. Affected: cm1 grub2 2.06~rc1-4 on CBL Mariner 1.0, cbl2 grub2 2.06~rc1-7 on CBL Mariner 2.0.
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