An update for shim is now available for openEuler-22.03-LTS Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2024-1117 Final 1.0 1.0 2024-02-02 Initial 2024-02-02 2024-02-02 openEuler SA Tool V1.0 2024-02-02 shim security update An update for shim is now available for openEuler-22.03-LTS. Initial UEFI bootloader that handles chaining to a trusted full \ bootloader under secure boot environments. Security Fix(es): A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise.(CVE-2023-40547) 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.(CVE-2023-40548) An out-of-bounds read flaw was found in Shim due to the lack of proper boundary verification during the load of a PE binary. This flaw allows an attacker to load a crafted PE binary, triggering the issue and crashing Shim, resulting in a denial of service.(CVE-2023-40549) 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.(CVE-2023-40550) 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.(CVE-2023-40551) An update for shim is now available for openEuler-22.03-LTS. openEuler Security has rated this update as having a security impact of high. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. High shim https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1117 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-40547 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-40548 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-40549 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-40550 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-40551 https://nvd.nist.gov/vuln/detail/CVE-2023-40547 https://nvd.nist.gov/vuln/detail/CVE-2023-40548 https://nvd.nist.gov/vuln/detail/CVE-2023-40549 https://nvd.nist.gov/vuln/detail/CVE-2023-40550 https://nvd.nist.gov/vuln/detail/CVE-2023-40551 openEuler-22.03-LTS shim-15.4-13.oe2203.aarch64.rpm shim-debugsource-15.4-13.oe2203.noarch.rpm shim-debuginfo-15.4-13.oe2203.noarch.rpm shim-15.4-13.oe2203.src.rpm shim-15.4-13.oe2203.x86_64.rpm A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. 2024-02-02 CVE-2023-40547 openEuler-22.03-LTS High 8.3 AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H shim security update 2024-02-02 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1117 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. 2024-02-02 CVE-2023-40548 openEuler-22.03-LTS Medium 4.9 AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L shim security update 2024-02-02 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1117 An out-of-bounds read flaw was found in Shim due to the lack of proper boundary verification during the load of a PE binary. This flaw allows an attacker to load a crafted PE binary, triggering the issue and crashing Shim, resulting in a denial of service. 2024-02-02 CVE-2023-40549 openEuler-22.03-LTS Medium 6.2 AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H shim security update 2024-02-02 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1117 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. 2024-02-02 CVE-2023-40550 openEuler-22.03-LTS Medium 5.5 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N shim security update 2024-02-02 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1117 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. 2024-02-02 CVE-2023-40551 openEuler-22.03-LTS Medium 5.1 AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H shim security update 2024-02-02 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1117