CVE-2023-40550— Shim: out-of-bound read in verify_buffer_sbat()
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I. Basic Information for CVE-2023-40550
Vulnerability Information
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Vulnerability Title
Shim: out-of-bound read in verify_buffer_sbat()
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存读
Source: NVD (National Vulnerability Database)
Vulnerability Title
Red Hat Shim 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat Shim是美国红帽（Red Hat）公司的一个简单的软件包。旨在用作 UEFI 系统上的第一阶段引导加载程序。 Red Hat Shim 存在安全漏洞，该漏洞源于存在越界读取问题，从而导致在系统启动阶段暴露敏感数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 7 | 0:15.8-3.el7 ~ * | cpe:/o:redhat:enterprise_linux:7::server | |
| Red Hat | Red Hat Enterprise Linux 7 | 0:15.8-1.el7 ~ * | cpe:/o:redhat:enterprise_linux:7::server | |
| Red Hat | Red Hat Enterprise Linux 8 | 0:15.8-4.el8_9 ~ * | cpe:/o:redhat:enterprise_linux:8::baseos | |
| Red Hat | Red Hat Enterprise Linux 8.2 Advanced Update Support | 0:15.8-2.el8_2 ~ * | cpe:/o:redhat:rhel_tus:8.2::baseos | |
| Red Hat | Red Hat Enterprise Linux 8.2 Telecommunications Update Service | 0:15.8-2.el8_2 ~ * | cpe:/o:redhat:rhel_tus:8.2::baseos | |
| Red Hat | Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions | 0:15.8-2.el8_2 ~ * | cpe:/o:redhat:rhel_tus:8.2::baseos | |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | 0:15.8-2.el8_4 ~ * | cpe:/o:redhat:rhel_aus:8.4::baseos | |
| Red Hat | Red Hat Enterprise Linux 8.4 Telecommunications Update Service | 0:15.8-2.el8_4 ~ * | cpe:/o:redhat:rhel_aus:8.4::baseos | |
| Red Hat | Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions | 0:15.8-2.el8_4 ~ * | cpe:/o:redhat:rhel_aus:8.4::baseos | |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support | 0:15.8-2.el8_6 ~ * | cpe:/o:redhat:rhel_eus:8.6::baseos | |
| Red Hat | Red Hat Enterprise Linux 8.8 Extended Update Support | 0:15.8-2.el8 ~ * | cpe:/o:redhat:rhel_eus:8.8::baseos | |
| Red Hat | Red Hat Enterprise Linux 8.8 Extended Update Support | 0:15.8-2.el8 ~ * | cpe:/o:redhat:rhel_eus:8.8::baseos | |
| Red Hat | Red Hat Enterprise Linux 9 | 0:15.8-4.el9_3 ~ * | cpe:/o:redhat:enterprise_linux:9::baseos | |
| Red Hat | Red Hat Enterprise Linux 9.0 Extended Update Support | 0:15.8-3.el9 ~ * | cpe:/a:redhat:rhel_eus:9.0::appstream | |
| Red Hat | Red Hat Enterprise Linux 9.0 Extended Update Support | 0:15.8-2.el9 ~ * | cpe:/a:redhat:rhel_eus:9.0::appstream | |
| Red Hat | Red Hat Enterprise Linux 9.0 Extended Update Support | 0:15.8-2.el9 ~ * | cpe:/a:redhat:rhel_eus:9.0::appstream | |
| Red Hat | Red Hat Enterprise Linux 9.2 Extended Update Support | 0:15.8-3.el9_2 ~ * | cpe:/o:redhat:rhel_eus:9.2::baseos |
II. Public POCs for CVE-2023-40550
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
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Same Patch Batch · Red Hat · 2024-01-29 · 5 CVEs total
| CVE-2023-40548 | 7.4 HIGH | Shim: interger overflow leads to heap buffer overflow in verify_sbat_section on 32-bits sy |
| CVE-2023-40549 | 6.2 MEDIUM | Shim: out-of-bounds read in verify_buffer_authenticode() malformed pe file |
| CVE-2023-40546 | 6.2 MEDIUM | Shim: out-of-bounds read printing error messages |
| CVE-2023-40551 | 5.1 MEDIUM | Shim: out of bounds read when parsing mz binaries |
IV. Related Vulnerabilities
Same product: Red Hat Enterprise Linux 7
- CVE-2026-2239
Gimp: gimp: application crash (dos) via crafted psd file due - CVE-2023-40551
Shim: out of bounds read when parsing mz binaries - CVE-2023-40549
Shim: out-of-bounds read in verify_buffer_authenticode() mal - CVE-2023-40546
Shim: out-of-bounds read printing error messages - CVE-2023-40548
Shim: interger overflow leads to heap buffer overflow in ver
Same vendor: Red Hat
- CVE-2026-42011
Gnutls: gnutls: security bypass due to incorrect name constr - CVE-2026-42010
Gnutls: gnutls: authentication bypass via nul character in u - CVE-2026-6420
Keylime: keylime: security bypass due to hardcoded tpm quote - CVE-2026-34956
Openvswitch: open vswitch: denial of service via malformed f - CVE-2026-34002
Xorg: xwayland: x.org x server: information disclosure or de
Same weakness: CWE-125
- CVE-2026-8177
XML::LibXML versions through 2.0210 for Perl read out-of-bou - CVE-2026-6104
Global buffer over-read in mb_convert_encoding() with attack - CVE-2026-7258
Out-of-bounds read in urldecode() on NetBSD - CVE-2026-8186
Open5GS NF client.c ogs_sbi_client_send_via_scp_or_sepp out- - CVE-2026-3508
ASUS System Control Interface 缓冲区错误漏洞
V. Comments for CVE-2023-40550
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