CVE-2023-40551
published 2024-01-29CVE-2023-40551: 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…
PriorityP421medium5.1CVSS 3.1
AVLACLPRHUINSUCLINAH
EPSS
0.39%
31.7th percentile
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.
Affected
17 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | shim | < shim 15.8-1~deb12u1 (bookworm) | shim 15.8-1~deb12u1 (bookworm) |
| fedoraproject | fedora | — | — |
| msrc | azl3_shim_15.4-2_on_azure_linux_3.0 | — | — |
| msrc | azl3_shim_15.8-5_on_azure_linux_3.0 | — | — |
| msrc | azure_linux_3.0_arm | — | — |
| msrc | azure_linux_3.0_x64 | — | — |
| msrc | cbl2_shim_15.4-2_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_shim_15.8-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux | — | — |
| redhat | shim | < 15.8 | 15.8 |
| redhat | shim | >= 0 < 15.8-1~deb11u1 | 15.8-1~deb11u1 |
| redhat | shim | >= 0 < 15.8-1~deb12u1 | 15.8-1~deb12u1 |
| redhat | shim | >= 0 < 15.8-1 | 15.8-1 |
| redhat | shim | >= 0 < 15.8-1 | 15.8-1 |
CVSS provenance
nvdv3.15.1MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H
osv5.1MEDIUM
vendor_debian5.1MEDIUM
vendor_msrc5.1MEDIUM
vendor_redhat5.1MEDIUM
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OSV
CVE-2023-40551: A flaw was found in the MZ binary format in Shim
osv·2024-01-29·CVSS 5.1
CVE-2023-40551 [MEDIUM] CVE-2023-40551: A flaw was found in the MZ binary format in Shim
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.
GHSA
GHSA-6j62-7qgg-9gww: A flaw was found in the MZ binary format in Shim
ghsa_unreviewed·2024-01-29
CVE-2023-40551 [MEDIUM] CWE-125 GHSA-6j62-7qgg-9gww: A flaw was found in the MZ binary format in Shim
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.
Red Hat
shim: out of bounds read when parsing MZ binaries
vendor_redhat·2024-01-23·CVSS 5.1
CVE-2023-40551 [MEDIUM] CWE-125 shim: out of bounds read when parsing MZ binaries
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.
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.
Microsoft
Shim: out of bounds read when parsing mz binaries
vendor_msrc·2024-01-09·CVSS 5.1
CVE-2023-40551 [MEDIUM] CWE-125 Shim: out of bounds read when parsing mz binaries
Shim: out of bounds read when parsing mz binaries
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
redhat: redhat
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.mic
Debian
CVE-2023-40551: shim - A flaw was found in the MZ binary format in Shim. An out-of-bounds read may occu...
vendor_debian·2023·CVSS 5.1
CVE-2023-40551 [MEDIUM] CVE-2023-40551: shim - A flaw was found in the MZ binary format in Shim. An out-of-bounds read may occu...
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.
Scope: local
bookworm: resolved (fixed in 15.8-1~deb12u1)
bullseye: resolved (fixed in 15.8-1~deb11u1)
forky: resolved (fixed in 15.8-1)
sid: resolved (fixed in 15.8-1)
trixie: resolved (fixed in 15.8-1)
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://access.redhat.com/errata/RHSA-2024:1834https://access.redhat.com/errata/RHSA-2024:1835https://access.redhat.com/errata/RHSA-2024:1873https://access.redhat.com/errata/RHSA-2024:1876https://access.redhat.com/errata/RHSA-2024:1883https://access.redhat.com/errata/RHSA-2024:1902https://access.redhat.com/errata/RHSA-2024:1903https://access.redhat.com/errata/RHSA-2024:1959https://access.redhat.com/errata/RHSA-2024:2086https://access.redhat.com/security/cve/CVE-2023-40551https://bugzilla.redhat.com/show_bug.cgi?id=2259918https://access.redhat.com/errata/RHSA-2024:1834https://access.redhat.com/errata/RHSA-2024:1835https://access.redhat.com/errata/RHSA-2024:1873https://access.redhat.com/errata/RHSA-2024:1876https://access.redhat.com/errata/RHSA-2024:1883https://access.redhat.com/errata/RHSA-2024:1902https://access.redhat.com/errata/RHSA-2024:1903https://access.redhat.com/errata/RHSA-2024:1959https://access.redhat.com/errata/RHSA-2024:2086https://access.redhat.com/security/cve/CVE-2023-40551https://bugzilla.redhat.com/show_bug.cgi?id=2259918https://lists.debian.org/debian-lts-announce/2024/05/msg00009.html
2024-01-29
Published