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	<DocumentTitle xml:lang="en">An update for unbound is now available for openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS,openEuler-22.03-LTS-SP1,openEuler-22.03-LTS-SP2 and 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-2024-1210</ID>
		</Identification>
		<Status>Final</Status>
		<Version>1.0</Version>
		<RevisionHistory>
			<Revision>
				<Number>1.0</Number>
				<Date>2024-03-01</Date>
				<Description>Initial</Description>
			</Revision>
		</RevisionHistory>
		<InitialReleaseDate>2024-03-01</InitialReleaseDate>
		<CurrentReleaseDate>2024-03-01</CurrentReleaseDate>
		<Generator>
			<Engine>openEuler SA Tool V1.0</Engine>
			<Date>2024-03-01</Date>
		</Generator>
	</DocumentTracking>
	<DocumentNotes>
		<Note Title="Synopsis" Type="General" Ordinal="1" xml:lang="en">unbound security update</Note>
		<Note Title="Summary" Type="General" Ordinal="2" xml:lang="en">An update for unbound is now available for openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS,openEuler-22.03-LTS-SP1,openEuler-22.03-LTS-SP2 and openEuler-22.03-LTS-SP3.</Note>
		<Note Title="Description" Type="General" Ordinal="3" xml:lang="en">Unbound is a validating, recursive, caching DNS resolver. It is designed to be fast and lean and incorporates modern features based on open standards. To help increase online privacy, Unbound supports DNS-over-TLS which allows clients to encrypt their communication. Unbound is available for most platforms such as FreeBSD, OpenBSD, NetBSD, MacOS, Linux and Microsoft Windows. Unbound is a totally free, open source software under the BSD license. It doesn&apos;t make custom builds or provide specific features to paying customers only.

Security Fix(es):

Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the &quot;KeyTrap&quot; issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records.(CVE-2023-50387)

The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the &quot;NSEC3&quot; issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.(CVE-2023-50868)

A vulnerability was found in Unbound due to incorrect default permissions, allowing any process outside the unbound group to modify the unbound runtime configuration. If a process can connect over localhost to port 8953, it can alter the configuration of unbound.service. This flaw allows an unprivileged attacker to manipulate a running instance, potentially altering forwarders, allowing them to track all queries forwarded by the local resolver, and, in some cases, disrupting resolving altogether.(CVE-2024-1488)</Note>
		<Note Title="Topic" Type="General" Ordinal="4" xml:lang="en">An update for unbound is now available for openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS,openEuler-22.03-LTS-SP1,openEuler-22.03-LTS-SP2 and 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">unbound</Note>
	</DocumentNotes>
	<DocumentReferences>
		<Reference Type="Self">
			<URL>https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1210</URL>
		</Reference>
		<Reference Type="openEuler CVE">
			<URL>https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-50387</URL>
			<URL>https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-50868</URL>
			<URL>https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2024-1488</URL>
		</Reference>
		<Reference Type="Other">
			<URL>https://nvd.nist.gov/vuln/detail/CVE-2023-50387</URL>
			<URL>https://nvd.nist.gov/vuln/detail/CVE-2023-50868</URL>
			<URL>https://nvd.nist.gov/vuln/detail/CVE-2024-1488</URL>
		</Reference>
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			<FullProductName ProductID="unbound-debuginfo-1.13.2-10" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP2">unbound-debuginfo-1.13.2-10.oe2203sp2.x86_64.rpm</FullProductName>
			<FullProductName ProductID="unbound-1.13.2-10" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP2">unbound-1.13.2-10.oe2203sp2.x86_64.rpm</FullProductName>
			<FullProductName ProductID="unbound-debugsource-1.13.2-10" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP2">unbound-debugsource-1.13.2-10.oe2203sp2.x86_64.rpm</FullProductName>
			<FullProductName ProductID="unbound-devel-1.13.2-10" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP2">unbound-devel-1.13.2-10.oe2203sp2.x86_64.rpm</FullProductName>
			<FullProductName ProductID="unbound-help-1.13.2-10" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP2">unbound-help-1.13.2-10.oe2203sp2.x86_64.rpm</FullProductName>
			<FullProductName ProductID="unbound-libs-1.13.2-10" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP2">unbound-libs-1.13.2-10.oe2203sp2.x86_64.rpm</FullProductName>
			<FullProductName ProductID="python3-unbound-1.13.2-10" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP2">python3-unbound-1.13.2-10.oe2203sp2.x86_64.rpm</FullProductName>
			<FullProductName ProductID="unbound-libs-1.13.2-10" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP3">unbound-libs-1.13.2-10.oe2203sp3.x86_64.rpm</FullProductName>
			<FullProductName ProductID="unbound-debugsource-1.13.2-10" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP3">unbound-debugsource-1.13.2-10.oe2203sp3.x86_64.rpm</FullProductName>
			<FullProductName ProductID="python3-unbound-1.13.2-10" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP3">python3-unbound-1.13.2-10.oe2203sp3.x86_64.rpm</FullProductName>
			<FullProductName ProductID="unbound-help-1.13.2-10" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP3">unbound-help-1.13.2-10.oe2203sp3.x86_64.rpm</FullProductName>
			<FullProductName ProductID="unbound-1.13.2-10" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP3">unbound-1.13.2-10.oe2203sp3.x86_64.rpm</FullProductName>
			<FullProductName ProductID="unbound-debuginfo-1.13.2-10" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP3">unbound-debuginfo-1.13.2-10.oe2203sp3.x86_64.rpm</FullProductName>
			<FullProductName ProductID="unbound-devel-1.13.2-10" CPE="cpe:/a:openEuler:openEuler:22.03-LTS-SP3">unbound-devel-1.13.2-10.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">Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the  KeyTrap  issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records.</Note>
		</Notes>
		<ReleaseDate>2024-03-01</ReleaseDate>
		<CVE>CVE-2023-50387</CVE>
		<ProductStatuses>
			<Status Type="Fixed">
				<ProductID>openEuler-20.03-LTS-SP1</ProductID>
				<ProductID>openEuler-20.03-LTS-SP4</ProductID>
				<ProductID>openEuler-22.03-LTS</ProductID>
				<ProductID>openEuler-22.03-LTS-SP1</ProductID>
				<ProductID>openEuler-22.03-LTS-SP2</ProductID>
				<ProductID>openEuler-22.03-LTS-SP3</ProductID>
			</Status>
		</ProductStatuses>
		<Threats>
			<Threat Type="Impact">
				<Description>High</Description>
			</Threat>
		</Threats>
		<CVSSScoreSets>
			<ScoreSet>
				<BaseScore>7.5</BaseScore>
				<Vector>AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H</Vector>
			</ScoreSet>
		</CVSSScoreSets>
		<Remediations>
			<Remediation Type="Vendor Fix">
				<Description>unbound security update</Description>
				<DATE>2024-03-01</DATE>
				<URL>https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1210</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">The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the &quot;NSEC3&quot; issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.</Note>
		</Notes>
		<ReleaseDate>2024-03-01</ReleaseDate>
		<CVE>CVE-2023-50868</CVE>
		<ProductStatuses>
			<Status Type="Fixed">
				<ProductID>openEuler-20.03-LTS-SP1</ProductID>
				<ProductID>openEuler-20.03-LTS-SP4</ProductID>
				<ProductID>openEuler-22.03-LTS</ProductID>
				<ProductID>openEuler-22.03-LTS-SP1</ProductID>
				<ProductID>openEuler-22.03-LTS-SP2</ProductID>
				<ProductID>openEuler-22.03-LTS-SP3</ProductID>
			</Status>
		</ProductStatuses>
		<Threats>
			<Threat Type="Impact">
				<Description>High</Description>
			</Threat>
		</Threats>
		<CVSSScoreSets>
			<ScoreSet>
				<BaseScore>7.5</BaseScore>
				<Vector>AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H</Vector>
			</ScoreSet>
		</CVSSScoreSets>
		<Remediations>
			<Remediation Type="Vendor Fix">
				<Description>unbound security update</Description>
				<DATE>2024-03-01</DATE>
				<URL>https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1210</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">A vulnerability was found in Unbound due to incorrect default permissions, allowing any process outside the unbound group to modify the unbound runtime configuration. If a process can connect over localhost to port 8953, it can alter the configuration of unbound.service. This flaw allows an unprivileged attacker to manipulate a running instance, potentially altering forwarders, allowing them to track all queries forwarded by the local resolver, and, in some cases, disrupting resolving altogether.</Note>
		</Notes>
		<ReleaseDate>2024-03-01</ReleaseDate>
		<CVE>CVE-2024-1488</CVE>
		<ProductStatuses>
			<Status Type="Fixed">
				<ProductID>openEuler-20.03-LTS-SP1</ProductID>
				<ProductID>openEuler-20.03-LTS-SP4</ProductID>
				<ProductID>openEuler-22.03-LTS</ProductID>
				<ProductID>openEuler-22.03-LTS-SP1</ProductID>
				<ProductID>openEuler-22.03-LTS-SP2</ProductID>
				<ProductID>openEuler-22.03-LTS-SP3</ProductID>
			</Status>
		</ProductStatuses>
		<Threats>
			<Threat Type="Impact">
				<Description>High</Description>
			</Threat>
		</Threats>
		<CVSSScoreSets>
			<ScoreSet>
				<BaseScore>8.0</BaseScore>
				<Vector>AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H</Vector>
			</ScoreSet>
		</CVSSScoreSets>
		<Remediations>
			<Remediation Type="Vendor Fix">
				<Description>unbound security update</Description>
				<DATE>2024-03-01</DATE>
				<URL>https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1210</URL>
			</Remediation>
		</Remediations>
	</Vulnerability>
</cvrfdoc>