An update for grub2 is now available for openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP3 and openEuler-22.03-LTS Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2022-1734 Final 1.0 1.0 2022-07-01 Initial 2022-07-01 2022-07-01 openEuler SA Tool V1.0 2022-07-01 grub2 security update An update for grub2 is now available for openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP3 and openEuler-22.03-LTS. GNU GRUB is a Multiboot boot loader. It was derived from GRUB, the GRand Unified Bootloader, which was originally designed and implemented by Erich Stefan Boleyn. Security Fix(es): A flaw was found in grub2 when handling split HTTP headers. While processing a split HTTP header, grub2 wrongly advances its control pointer to the internal buffer by one position, which can lead to an out-of-bounds write. This flaw allows an attacker to leverage this issue by crafting a malicious set of HTTP packages making grub2 corrupt its internal memory metadata structure. This leads to data integrity and confidentiality issues or forces grub to crash, resulting in a denial of service attack.(CVE-2022-28734) A use-after-free vulnerability was found on grub2's chainloader command. This flaw allows an attacker to gain access to restricted data or cause arbitrary code execution if they can establish control from grub's memory allocation pattern.(CVE-2022-28736) A flaw was found in grub2 when handling JPEG images. This flaw allows an attacker to craft a malicious JPEG image, which leads to an underflow on a grub2's internal pointer, leading to a heap-based out-of-bounds write. Secure-boot mechanisms circumvention and arbitrary code execution may also be achievable.(CVE-2021-3697) A flaw was found in grub2 when handling a PNG image header. When decoding the data contained in the Huffman table at the PNG file header, an out-of-bounds write may happen on grub's heap.(CVE-2021-3696) A flaw was found in grub2 when handling IPv4 packets. This flaw allows an attacker to craft a malicious packet, triggering an integer underflow in grub code. Consequently, the memory allocation for handling the packet data may be smaller than the size needed. This issue causes an out-of-bands write during packet handling, compromising data integrity, confidentiality issues, a denial of service, and remote code execution.(CVE-2022-28733) A flaw was found in grub 2, where a crafted 16-bit grayscale PNG image may lead to an out-of-bounds write. This flaw allows an attacker to corrupt the data on the heap portion of the grub2's memory, leading to possible code execution and the circumvention of the secure boot mechanism.(CVE-2021-3695) A flaw was found in grub2. The shim_lock verifier from grub2 allows non-kernel files to be loaded when secure boot is enabled, giving the possibility of unverified code or modules to be loaded when it should not be allowed. (CVE-2022-28735) An update for grub2 is now available for openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP3 and 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 grub2 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1734 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2022-28734 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2022-28736 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-3697 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-3696 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2022-28733 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-3695 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2022-28735 https://nvd.nist.gov/vuln/detail/CVE-2022-28734 https://nvd.nist.gov/vuln/detail/CVE-2022-28736 https://nvd.nist.gov/vuln/detail/CVE-2021-3697 https://nvd.nist.gov/vuln/detail/CVE-2021-3696 https://nvd.nist.gov/vuln/detail/CVE-2022-28733 https://nvd.nist.gov/vuln/detail/CVE-2021-3695 https://nvd.nist.gov/vuln/detail/CVE-2022-28735 openEuler-20.03-LTS-SP1 openEuler-20.03-LTS-SP3 openEuler-22.03-LTS grub2-debugsource-2.04-24.oe1.aarch64.rpm grub2-efi-aa64-2.04-24.oe1.aarch64.rpm grub2-tools-minimal-2.04-24.oe1.aarch64.rpm grub2-efi-aa64-cdboot-2.04-24.oe1.aarch64.rpm grub2-debuginfo-2.04-24.oe1.aarch64.rpm grub2-tools-2.04-24.oe1.aarch64.rpm grub2-tools-extra-2.04-24.oe1.aarch64.rpm grub2-tools-extra-2.04-24.oe1.aarch64.rpm grub2-debugsource-2.04-24.oe1.aarch64.rpm grub2-debuginfo-2.04-24.oe1.aarch64.rpm grub2-tools-minimal-2.04-24.oe1.aarch64.rpm grub2-efi-aa64-cdboot-2.04-24.oe1.aarch64.rpm grub2-tools-2.04-24.oe1.aarch64.rpm grub2-efi-aa64-2.04-24.oe1.aarch64.rpm grub2-tools-2.06-10.oe2203.aarch64.rpm grub2-debugsource-2.06-10.oe2203.aarch64.rpm grub2-efi-aa64-cdboot-2.06-10.oe2203.aarch64.rpm grub2-efi-aa64-2.06-10.oe2203.aarch64.rpm grub2-tools-minimal-2.06-10.oe2203.aarch64.rpm grub2-tools-extra-2.06-10.oe2203.aarch64.rpm grub2-debuginfo-2.06-10.oe2203.aarch64.rpm grub2-efi-x64-modules-2.04-24.oe1.noarch.rpm grub2-efi-ia32-modules-2.04-24.oe1.noarch.rpm grub2-common-2.04-24.oe1.noarch.rpm grub2-pc-modules-2.04-24.oe1.noarch.rpm grub2-efi-aa64-modules-2.04-24.oe1.noarch.rpm grub2-help-2.04-24.oe1.noarch.rpm grub2-efi-x64-modules-2.04-24.oe1.noarch.rpm grub2-common-2.04-24.oe1.noarch.rpm grub2-help-2.04-24.oe1.noarch.rpm grub2-pc-modules-2.04-24.oe1.noarch.rpm grub2-efi-aa64-modules-2.04-24.oe1.noarch.rpm grub2-efi-ia32-modules-2.04-24.oe1.noarch.rpm grub2-efi-ia32-modules-2.06-10.oe2203.noarch.rpm grub2-efi-aa64-modules-2.06-10.oe2203.noarch.rpm grub2-pc-modules-2.06-10.oe2203.noarch.rpm grub2-efi-x64-modules-2.06-10.oe2203.noarch.rpm grub2-help-2.06-10.oe2203.noarch.rpm grub2-common-2.06-10.oe2203.noarch.rpm grub2-2.04-24.oe1.src.rpm grub2-2.04-24.oe1.src.rpm grub2-2.06-10.oe2203.src.rpm grub2-efi-x64-2.04-24.oe1.x86_64.rpm grub2-tools-extra-2.04-24.oe1.x86_64.rpm grub2-tools-minimal-2.04-24.oe1.x86_64.rpm grub2-pc-2.04-24.oe1.x86_64.rpm grub2-efi-ia32-2.04-24.oe1.x86_64.rpm grub2-efi-ia32-cdboot-2.04-24.oe1.x86_64.rpm grub2-debuginfo-2.04-24.oe1.x86_64.rpm grub2-efi-x64-cdboot-2.04-24.oe1.x86_64.rpm grub2-tools-efi-2.04-24.oe1.x86_64.rpm grub2-tools-2.04-24.oe1.x86_64.rpm grub2-debugsource-2.04-24.oe1.x86_64.rpm grub2-pc-2.04-24.oe1.x86_64.rpm grub2-efi-x64-cdboot-2.04-24.oe1.x86_64.rpm grub2-efi-ia32-2.04-24.oe1.x86_64.rpm grub2-tools-minimal-2.04-24.oe1.x86_64.rpm grub2-tools-extra-2.04-24.oe1.x86_64.rpm grub2-tools-2.04-24.oe1.x86_64.rpm grub2-efi-x64-2.04-24.oe1.x86_64.rpm grub2-efi-ia32-cdboot-2.04-24.oe1.x86_64.rpm grub2-debuginfo-2.04-24.oe1.x86_64.rpm grub2-tools-efi-2.04-24.oe1.x86_64.rpm grub2-debugsource-2.04-24.oe1.x86_64.rpm grub2-pc-2.06-10.oe2203.x86_64.rpm grub2-tools-efi-2.06-10.oe2203.x86_64.rpm grub2-efi-x64-2.06-10.oe2203.x86_64.rpm grub2-efi-ia32-2.06-10.oe2203.x86_64.rpm grub2-efi-x64-cdboot-2.06-10.oe2203.x86_64.rpm grub2-tools-minimal-2.06-10.oe2203.x86_64.rpm grub2-efi-ia32-cdboot-2.06-10.oe2203.x86_64.rpm grub2-tools-extra-2.06-10.oe2203.x86_64.rpm grub2-debugsource-2.06-10.oe2203.x86_64.rpm grub2-tools-2.06-10.oe2203.x86_64.rpm grub2-debuginfo-2.06-10.oe2203.x86_64.rpm A flaw was found in grub2 when handling split HTTP headers. While processing a split HTTP header, grub2 wrongly advances its control pointer to the internal buffer by one position, which can lead to an out-of-bounds write. This flaw allows an attacker to leverage this issue by crafting a malicious set of HTTP packages making grub2 corrupt its internal memory metadata structure. This leads to data integrity and confidentiality issues or forces grub to crash, resulting in a denial of service attack. 2022-07-01 CVE-2022-28734 openEuler-20.03-LTS-SP1 openEuler-20.03-LTS-SP3 openEuler-22.03-LTS High 7.0 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H grub2 security update 2022-07-01 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1734 A use-after-free vulnerability was found on grub2's chainloader command. This flaw allows an attacker to gain access to restricted data or cause arbitrary code execution if they can establish control from grub's memory allocation pattern. 2022-07-01 CVE-2022-28736 openEuler-20.03-LTS-SP1 openEuler-20.03-LTS-SP3 openEuler-22.03-LTS Medium 6.4 AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H grub2 security update 2022-07-01 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1734 A flaw was found in grub2 when handling JPEG images. This flaw allows an attacker to craft a malicious JPEG image, which leads to an underflow on a grub2's internal pointer, leading to a heap-based out-of-bounds write. Secure-boot mechanisms circumvention and arbitrary code execution may also be achievable. 2022-07-01 CVE-2021-3697 openEuler-20.03-LTS-SP1 openEuler-20.03-LTS-SP3 openEuler-22.03-LTS High 7.5 AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H grub2 security update 2022-07-01 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1734 A flaw was found in grub2 when handling a PNG image header. When decoding the data contained in the Huffman table at the PNG file header, an out-of-bounds write may happen on grub's heap. 2022-07-01 CVE-2021-3696 openEuler-20.03-LTS-SP1 openEuler-20.03-LTS-SP3 openEuler-22.03-LTS Medium 5.0 AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L grub2 security update 2022-07-01 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1734 A flaw was found in grub2 when handling IPv4 packets. This flaw allows an attacker to craft a malicious packet, triggering an integer underflow in grub code. Consequently, the memory allocation for handling the packet data may be smaller than the size needed. This issue causes an out-of-bands write during packet handling, compromising data integrity, confidentiality issues, a denial of service, and remote code execution. 2022-07-01 CVE-2022-28733 openEuler-20.03-LTS-SP1 openEuler-20.03-LTS-SP3 openEuler-22.03-LTS High 8.8 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H grub2 security update 2022-07-01 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1734 A flaw was found in grub 2, where a crafted 16-bit grayscale PNG image may lead to an out-of-bounds write. This flaw allows an attacker to corrupt the data on the heap portion of the grub2's memory, leading to possible code execution and the circumvention of the secure boot mechanism. 2022-07-01 CVE-2021-3695 openEuler-20.03-LTS-SP1 openEuler-20.03-LTS-SP3 openEuler-22.03-LTS High 7.5 AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H grub2 security update 2022-07-01 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1734 A flaw was found in grub2. The shim_lock verifier from grub2 allows non-kernel files to be loaded when secure boot is enabled, giving the possibility of unverified code or modules to be loaded when it should not be allowed. 2022-07-01 CVE-2022-28735 openEuler-22.03-LTS Medium 6.7 AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H grub2 security update 2022-07-01 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1734