Test ID:	1.3.6.1.4.1.25623.1.1.2.2022.2883
Category:	Huawei EulerOS Local Security Checks
Title:	Huawei EulerOS: Security Advisory for grub2 (EulerOS-SA-2022-2883)
Summary:	The remote host is missing an update for the Huawei EulerOS 'grub2' package(s) announced via the EulerOS-SA-2022-2883 advisory.
Description:	Summary: The remote host is missing an update for the Huawei EulerOS 'grub2' package(s) announced via the EulerOS-SA-2022-2883 advisory. Vulnerability Insight: 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 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 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. 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) 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 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 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) Affected Software/OS: 'grub2' package(s) on Huawei EulerOS Virtualization release 2.10.1. Solution: Please install the updated package(s). CVSS Score: 6.9 CVSS Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2021-3695 https://security.gentoo.org/glsa/202209-12 https://bugzilla.redhat.com/show_bug.cgi?id=1991685 Common Vulnerability Exposure (CVE) ID: CVE-2021-3696 https://bugzilla.redhat.com/show_bug.cgi?id=1991686 Common Vulnerability Exposure (CVE) ID: CVE-2021-3697 https://bugzilla.redhat.com/show_bug.cgi?id=1991687 Common Vulnerability Exposure (CVE) ID: CVE-2022-28733 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28733 https://www.openwall.com/lists/oss-security/2022/06/07/5 Common Vulnerability Exposure (CVE) ID: CVE-2022-28734 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28734 Common Vulnerability Exposure (CVE) ID: CVE-2022-28735 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28735 Common Vulnerability Exposure (CVE) ID: CVE-2022-28736 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28736
Copyright	Copyright (C) 2022 Greenbone AG

This is only one of 145615 vulnerability tests in our test suite. Find out more about running a complete security audit. To run a free test of this vulnerability against your system, register below.