vulnerability
Ubuntu: (CVE-2023-40548): shim-signed vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:M/Au:N/C:C/I:C/A:C) | Jan 29, 2024 | Nov 19, 2024 | Apr 16, 2026 |
Severity
7
CVSS
(AV:L/AC:M/Au:N/C:C/I:C/A:C)
Published
Jan 29, 2024
Added
Nov 19, 2024
Modified
Apr 16, 2026
Description
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 a heap-based buffer overflow. This flaw causes memory corruption and can lead to a crash or data integrity issues during the boot phase.
Solutions
ubuntu-upgrade-shimubuntu-upgrade-shim-signed
Rapid7 Labs
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