CVE-2023-40550 — Out-of-bounds Read in Redhat Shim

CWE-125 — Out-of-bounds Read7 documents7 sources
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 93.39%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Redhat ShimFedoraproject FedoraRedhat Enterprise Linux
Timeline
PublishedJan 29

Description

An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue may expose sensitive data during the system's boot phase.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NExploitability: 1.8 | Impact: 3.6

Affected Packages2 packages

▶NVDredhat/shim< 15.8
▶Debianredhat/shim< 15.8-1~deb11u1+3

Also affects: Fedora 39, Enterprise Linux 8.0, 9.0

🔴Vulnerability Details

3
GHSA
GHSA-grx2-83w4-8647: An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information↗2024-01-29
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OSV
CVE-2023-40550: An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information↗2024-01-29
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CVEList
Shim: out-of-bound read in verify_buffer_sbat()↗2024-01-29
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📋Vendor Advisories

3
Red Hat
shim: Out-of-bound read in verify_buffer_sbat()↗2024-01-23
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Microsoft
Shim: out-of-bound read in verify_buffer_sbat()↗2024-01-09
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Debian
CVE-2023-40550: shim - An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT ...↗2023
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