<?xml version="1.0" encoding="UTF-8"?>
<cvrfdoc xmlns="http://www.icasi.org/CVRF/schema/cvrf/1.1" xmlns:cvrf="http://www.icasi.org/CVRF/schema/cvrf/1.1">
	<DocumentTitle xml:lang="en">An update for shim is now available for openEuler-22.03-LTS-SP3</DocumentTitle>
	<DocumentType>Security Advisory</DocumentType>
	<DocumentPublisher Type="Vendor">
		<ContactDetails>openeuler-security@openeuler.org</ContactDetails>
		<IssuingAuthority>openEuler security committee</IssuingAuthority>
	</DocumentPublisher>
	<DocumentTracking>
		<Identification>
			<ID>openEuler-SA-2024-1120</ID>
		</Identification>
		<Status>Final</Status>
		<Version>1.0</Version>
		<RevisionHistory>
			<Revision>
				<Number>1.0</Number>
				<Date>2024-02-02</Date>
				<Description>Initial</Description>
			</Revision>
		</RevisionHistory>
		<InitialReleaseDate>2024-02-02</InitialReleaseDate>
		<CurrentReleaseDate>2024-02-02</CurrentReleaseDate>
		<Generator>
			<Engine>openEuler SA Tool V1.0</Engine>
			<Date>2024-02-02</Date>
		</Generator>
	</DocumentTracking>
	<DocumentNotes>
		<Note Title="Synopsis" Type="General" Ordinal="1" xml:lang="en">shim security update</Note>
		<Note Title="Summary" Type="General" Ordinal="2" xml:lang="en">An update for shim is now available for openEuler-22.03-LTS-SP3.</Note>
		<Note Title="Description" Type="General" Ordinal="3" xml:lang="en">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&apos;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&apos;s boot phase.(CVE-2023-40551)</Note>
		<Note Title="Topic" Type="General" Ordinal="4" xml:lang="en">An update for shim is now available for openEuler-22.03-LTS-SP3.

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.</Note>
		<Note Title="Severity" Type="General" Ordinal="5" xml:lang="en">High</Note>
		<Note Title="Affected Component" Type="General" Ordinal="6" xml:lang="en">shim</Note>
	</DocumentNotes>
	<DocumentReferences>
		<Reference Type="Self">
			<URL>https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1120</URL>
		</Reference>
		<Reference Type="openEuler CVE">
			<URL>https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-40547</URL>
			<URL>https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-40548</URL>
			<URL>https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-40549</URL>
			<URL>https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-40550</URL>
			<URL>https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-40551</URL>
		</Reference>
		<Reference Type="Other">
			<URL>https://nvd.nist.gov/vuln/detail/CVE-2023-40547</URL>
			<URL>https://nvd.nist.gov/vuln/detail/CVE-2023-40548</URL>
			<URL>https://nvd.nist.gov/vuln/detail/CVE-2023-40549</URL>
			<URL>https://nvd.nist.gov/vuln/detail/CVE-2023-40550</URL>
			<URL>https://nvd.nist.gov/vuln/detail/CVE-2023-40551</URL>
		</Reference>
	</DocumentReferences>
	<ProductTree xmlns="http://www.icasi.org/CVRF/schema/prod/1.1">
		<Branch Type="Product Name" Name="openEuler">
			<FullProductName ProductID="openEuler-22.03-LTS-SP3" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP3">openEuler-22.03-LTS-SP3</FullProductName>
		</Branch>
		<Branch Type="Package Arch" Name="aarch64">
			<FullProductName ProductID="shim-debuginfo-15.6-19" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP3">shim-debuginfo-15.6-19.oe2203sp3.aarch64.rpm</FullProductName>
			<FullProductName ProductID="shim-15.6-19" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP3">shim-15.6-19.oe2203sp3.aarch64.rpm</FullProductName>
			<FullProductName ProductID="shim-debugsource-15.6-19" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP3">shim-debugsource-15.6-19.oe2203sp3.aarch64.rpm</FullProductName>
		</Branch>
		<Branch Type="Package Arch" Name="src">
			<FullProductName ProductID="shim-15.6-19" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP3">shim-15.6-19.oe2203sp3.src.rpm</FullProductName>
		</Branch>
		<Branch Type="Package Arch" Name="x86_64">
			<FullProductName ProductID="shim-debuginfo-15.6-19" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP3">shim-debuginfo-15.6-19.oe2203sp3.x86_64.rpm</FullProductName>
			<FullProductName ProductID="shim-15.6-19" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP3">shim-15.6-19.oe2203sp3.x86_64.rpm</FullProductName>
			<FullProductName ProductID="shim-debugsource-15.6-19" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP3">shim-debugsource-15.6-19.oe2203sp3.x86_64.rpm</FullProductName>
		</Branch>
	</ProductTree>
	<Vulnerability Ordinal="1" xmlns="http://www.icasi.org/CVRF/schema/vuln/1.1">
		<Notes>
			<Note Title="Vulnerability Description" Type="General" Ordinal="1" xml:lang="en">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.</Note>
		</Notes>
		<ReleaseDate>2024-02-02</ReleaseDate>
		<CVE>CVE-2023-40547</CVE>
		<ProductStatuses>
			<Status Type="Fixed">
				<ProductID>openEuler-22.03-LTS-SP3</ProductID>
			</Status>
		</ProductStatuses>
		<Threats>
			<Threat Type="Impact">
				<Description>High</Description>
			</Threat>
		</Threats>
		<CVSSScoreSets>
			<ScoreSet>
				<BaseScore>8.3</BaseScore>
				<Vector>AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H</Vector>
			</ScoreSet>
		</CVSSScoreSets>
		<Remediations>
			<Remediation Type="Vendor Fix">
				<Description>shim security update</Description>
				<DATE>2024-02-02</DATE>
				<URL>https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1120</URL>
			</Remediation>
		</Remediations>
	</Vulnerability>
	<Vulnerability Ordinal="2" xmlns="http://www.icasi.org/CVRF/schema/vuln/1.1">
		<Notes>
			<Note Title="Vulnerability Description" Type="General" Ordinal="2" xml:lang="en">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.</Note>
		</Notes>
		<ReleaseDate>2024-02-02</ReleaseDate>
		<CVE>CVE-2023-40548</CVE>
		<ProductStatuses>
			<Status Type="Fixed">
				<ProductID>openEuler-22.03-LTS-SP3</ProductID>
			</Status>
		</ProductStatuses>
		<Threats>
			<Threat Type="Impact">
				<Description>Medium</Description>
			</Threat>
		</Threats>
		<CVSSScoreSets>
			<ScoreSet>
				<BaseScore>4.9</BaseScore>
				<Vector>AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L</Vector>
			</ScoreSet>
		</CVSSScoreSets>
		<Remediations>
			<Remediation Type="Vendor Fix">
				<Description>shim security update</Description>
				<DATE>2024-02-02</DATE>
				<URL>https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1120</URL>
			</Remediation>
		</Remediations>
	</Vulnerability>
	<Vulnerability Ordinal="3" xmlns="http://www.icasi.org/CVRF/schema/vuln/1.1">
		<Notes>
			<Note Title="Vulnerability Description" Type="General" Ordinal="3" xml:lang="en">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.</Note>
		</Notes>
		<ReleaseDate>2024-02-02</ReleaseDate>
		<CVE>CVE-2023-40549</CVE>
		<ProductStatuses>
			<Status Type="Fixed">
				<ProductID>openEuler-22.03-LTS-SP3</ProductID>
			</Status>
		</ProductStatuses>
		<Threats>
			<Threat Type="Impact">
				<Description>Medium</Description>
			</Threat>
		</Threats>
		<CVSSScoreSets>
			<ScoreSet>
				<BaseScore>6.2</BaseScore>
				<Vector>AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H</Vector>
			</ScoreSet>
		</CVSSScoreSets>
		<Remediations>
			<Remediation Type="Vendor Fix">
				<Description>shim security update</Description>
				<DATE>2024-02-02</DATE>
				<URL>https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1120</URL>
			</Remediation>
		</Remediations>
	</Vulnerability>
	<Vulnerability Ordinal="4" xmlns="http://www.icasi.org/CVRF/schema/vuln/1.1">
		<Notes>
			<Note Title="Vulnerability Description" Type="General" Ordinal="4" xml:lang="en">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.</Note>
		</Notes>
		<ReleaseDate>2024-02-02</ReleaseDate>
		<CVE>CVE-2023-40550</CVE>
		<ProductStatuses>
			<Status Type="Fixed">
				<ProductID>openEuler-22.03-LTS-SP3</ProductID>
			</Status>
		</ProductStatuses>
		<Threats>
			<Threat Type="Impact">
				<Description>Medium</Description>
			</Threat>
		</Threats>
		<CVSSScoreSets>
			<ScoreSet>
				<BaseScore>5.5</BaseScore>
				<Vector>AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N</Vector>
			</ScoreSet>
		</CVSSScoreSets>
		<Remediations>
			<Remediation Type="Vendor Fix">
				<Description>shim security update</Description>
				<DATE>2024-02-02</DATE>
				<URL>https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1120</URL>
			</Remediation>
		</Remediations>
	</Vulnerability>
	<Vulnerability Ordinal="5" xmlns="http://www.icasi.org/CVRF/schema/vuln/1.1">
		<Notes>
			<Note Title="Vulnerability Description" Type="General" Ordinal="5" xml:lang="en">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.</Note>
		</Notes>
		<ReleaseDate>2024-02-02</ReleaseDate>
		<CVE>CVE-2023-40551</CVE>
		<ProductStatuses>
			<Status Type="Fixed">
				<ProductID>openEuler-22.03-LTS-SP3</ProductID>
			</Status>
		</ProductStatuses>
		<Threats>
			<Threat Type="Impact">
				<Description>Medium</Description>
			</Threat>
		</Threats>
		<CVSSScoreSets>
			<ScoreSet>
				<BaseScore>5.1</BaseScore>
				<Vector>AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H</Vector>
			</ScoreSet>
		</CVSSScoreSets>
		<Remediations>
			<Remediation Type="Vendor Fix">
				<Description>shim security update</Description>
				<DATE>2024-02-02</DATE>
				<URL>https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1120</URL>
			</Remediation>
		</Remediations>
	</Vulnerability>
</cvrfdoc>