Test ID:	1.3.6.1.4.1.25623.1.1.2.2022.2611
Category:	Huawei EulerOS Local Security Checks
Title:	Huawei EulerOS: Security Advisory for grub2 (EulerOS-SA-2022-2611)
Summary:	The remote host is missing an update for the Huawei EulerOS 'grub2' package(s) announced via the EulerOS-SA-2022-2611 advisory.
Description:	Summary: The remote host is missing an update for the Huawei EulerOS 'grub2' package(s) announced via the EulerOS-SA-2022-2611 advisory. Vulnerability Insight: 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 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 V2.0SP3. 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-2022-28734 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28734 https://www.openwall.com/lists/oss-security/2022/06/07/5
Copyright	Copyright (C) 2022 Greenbone AG

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