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Ubuntu.comUB:CVE-2023-40551HistoryJan 23, 2024 - 12:00 a.m.
CVE-2023-40551
2024-01-2300:00:00
ubuntu.com
ubuntu.com
12
flaw
mz binary format
shim
out-of-bounds read
system boot
sensitive data
uefi
security response team
secureboot-db
install media keys
key revocation
evil housekeeper attacks
5.1 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H
6.5 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
9.6%
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.
Bugs
Notes
| Author | Note |
|---|---|
| eslerm | UEFI Security Response Team states that dbx update is not needed secureboot-db should only ever be updated after shim secureboot-db is not updated on ESM releases as doing so would revoke install media keys Note that key revocation is required to protect against evil housekeeper attacks (such as BlackLotus) |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | shim | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | shim | < any | UNKNOWN |
| ubuntu | 22.04 | noarch | shim | < any | UNKNOWN |
| ubuntu | 23.10 | noarch | shim | < any | UNKNOWN |
| ubuntu | 24.04 | noarch | shim | < 15.8-0ubuntu1 | UNKNOWN |
| ubuntu | 18.04 | noarch | shim-signed | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | shim-signed | < any | UNKNOWN |
| ubuntu | 22.04 | noarch | shim-signed | < any | UNKNOWN |
| ubuntu | 23.10 | noarch | shim-signed | < any | UNKNOWN |
| ubuntu | 24.04 | noarch | shim-signed | < 15.8 | UNKNOWN |
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CVE-2023-40551 Shim: out of bounds read when parsing mz binaries
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Important: shim security update
2024-04-18 00:00:00
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2024-04-18 00:00:00
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EulerOS 2.0 SP10 : shim (EulerOS-SA-2024-1579)
2024-05-09 00:00:00
EulerOS 2.0 SP9 : shim (EulerOS-SA-2024-1497)
2024-04-09 00:00:00
EulerOS 2.0 SP10 : shim (EulerOS-SA-2024-1602)
2024-05-09 00:00:00
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Huawei EulerOS: Security Advisory for shim (EulerOS-SA-2024-1602)
2024-05-10 00:00:00
Huawei EulerOS: Security Advisory for shim (EulerOS-SA-2024-1497)
2024-04-08 00:00:00
Huawei EulerOS: Security Advisory for shim (EulerOS-SA-2024-1518)
2024-04-08 00:00:00
redos
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ROS-20240411-07
2024-04-11 00:00:00
redhat
redhat
(RHSA-2024:1834) Important: shim security update
2024-04-16 13:24:13
(RHSA-2024:1876) Important: shim bug fix update
2024-04-18 00:58:24
(RHSA-2024:1873) Important: shim security update
2024-04-18 00:58:14
almalinux
almalinux
Important: shim bug fix update
2024-04-18 00:00:00
Important: shim security update
2024-04-18 00:00:00
fedora
fedora
[SECURITY] Fedora 38 Update: shim-unsigned-x64-15.8-2
2024-03-18 02:18:45
[SECURITY] Fedora 38 Update: shim-15.8-2
2024-03-18 02:18:44
[SECURITY] Fedora 38 Update: shim-unsigned-aarch64-15.8-2
2024-03-18 02:18:45
debian
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[SECURITY] [DLA 3813-1] shim security update
2024-05-14 09:57:15
oraclelinux
oraclelinux
shim security update
2024-04-25 00:00:00
shim bug fix update
2024-04-22 00:00:00
shim security update
2024-05-01 00:00:00
thn
thn
Critical Boot Loader Vulnerability in Shim Impacts Nearly All Linux Distros
2024-02-07 13:33:00
ibm
ibm
Security Bulletin: IBM QRadar SIEM contains multiple vulnerabilities
2024-06-06 14:36:19
5.1 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H
6.5 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
9.6%
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