Debian Security Bug TrackerDEBIANCVE:CVE-2023-40548CVE-2023-40548
7.4 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
5.5 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
28.1%
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.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Debian | 12 | all | shim | <= 15.7-1 | shim_15.7-1_all.deb |
| Debian | 11 | all | shim | <= 15.7-1~deb11u1 | shim_15.7-1~deb11u1_all.deb |
| Debian | 10 | all | shim | < 15.8-1~deb10u1 | shim_15.8-1~deb10u1_all.deb |
| Debian | 999 | all | shim | < 15.8-1 | shim_15.8-1_all.deb |
| Debian | 13 | all | shim | <= 15.7-1 | shim_15.7-1_all.deb |
Related
7.4 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
5.5 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
28.1%