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  <DocumentTitle xml:lang="en">Security update for the Linux Kernel (Live Patch 10 for SLE 12 SP3)</DocumentTitle>
  <DocumentType>SUSE Patch</DocumentType>
  <DocumentPublisher Type="Vendor">
    <ContactDetails>security@suse.de</ContactDetails>
    <IssuingAuthority>SUSE Security Team</IssuingAuthority>
  </DocumentPublisher>
  <DocumentTracking>
    <Identification>
      <ID>SUSE-SU-2018:1636-1</ID>
    </Identification>
    <Status>Final</Status>
    <Version>1</Version>
    <RevisionHistory>
      <Revision>
        <Number>1</Number>
        <Date>2018-06-11T08:40:31Z</Date>
        <Description>current</Description>
      </Revision>
    </RevisionHistory>
    <InitialReleaseDate>2018-06-11T08:40:31Z</InitialReleaseDate>
    <CurrentReleaseDate>2018-06-11T08:40:31Z</CurrentReleaseDate>
    <Generator>
      <Engine>cve-database/bin/generate-cvrf.pl</Engine>
      <Date>2017-02-24T01:00:00Z</Date>
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  <DocumentNotes>
    <Note Title="Topic" Type="Summary" Ordinal="1" xml:lang="en">Security update for the Linux Kernel (Live Patch 10 for SLE 12 SP3)</Note>
    <Note Title="Details" Type="General" Ordinal="2" xml:lang="en">This update for the Linux Kernel 4.4.120-94_17 fixes several issues.

The following security issues were fixed:

- CVE-2018-8897: A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer's Manual (SDM) was mishandled in the development of some or all operating-system kernels, resulting in unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS, as demonstrated by (for example) privilege escalation in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux kernel crash. The MOV to SS and POP SS instructions inhibit interrupts (including NMIs), data breakpoints, and single step trap exceptions until the instruction boundary following the next instruction (SDM Vol. 3A; section 6.8.3). (The inhibited data breakpoints are those on memory accessed by the MOV to SS or POP to SS instruction itself.) Note that debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF) system flag (SDM Vol. 3A; section 2.3). If the instruction following the MOV to SS or POP to SS instruction is an instruction like SYSCALL, SYSENTER, INT 3, etc. that transfers control to the operating system at CPL &lt; 3, the debug exception is delivered after the transfer to CPL &lt; 3 is complete. OS kernels may not expect this order of events and may therefore experience unexpected behavior when it occurs (bsc#1090368).
- CVE-2018-8781: The udl_fb_mmap function in drivers/gpu/drm/udl/udl_fb.c had an integer-overflow vulnerability allowing local users with access to the udldrmfb driver to obtain full read and write permissions on kernel physical pages, resulting in a code execution in kernel space (bsc#1090646).
- bsc#1083125: Fixed kgraft: small race in reversion code
- CVE-2018-1087: kernel KVM was vulnerable to a flaw in the way the Linux kernel's KVM hypervisor handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first instruction after the stack switch is executed. An unprivileged KVM guest user could use this flaw to crash the guest or, potentially, escalate their privileges in the guest (bsc#1090869)
before
</Note>
    <Note Title="Terms of Use" Type="Legal Disclaimer" Ordinal="3" xml:lang="en">The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).</Note>
    <Note Title="Patchnames" Type="Details" Ordinal="4" xml:lang="en">SUSE-SLE-Live-Patching-12-SP3-2018-1110</Note>
  </DocumentNotes>
  <DocumentDistribution xml:lang="en">Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0)</DocumentDistribution>
  <DocumentReferences>
    <Reference Type="Self">
      <URL>https://www.suse.com/support/update/announcement/2018/suse-su-20181636-1/</URL>
      <Description>Link for SUSE-SU-2018:1636-1</Description>
    </Reference>
    <Reference Type="Self">
      <URL>https://lists.suse.com/pipermail/sle-security-updates/2018-June/004170.html</URL>
      <Description>E-Mail link for SUSE-SU-2018:1636-1</Description>
    </Reference>
    <Reference Type="Self">
      <URL>https://www.suse.com/support/security/rating/</URL>
      <Description>SUSE Security Ratings</Description>
    </Reference>
    <Reference Type="Self">
      <URL>https://bugzilla.suse.com/1083125</URL>
      <Description>SUSE Bug 1083125</Description>
    </Reference>
    <Reference Type="Self">
      <URL>https://bugzilla.suse.com/1090368</URL>
      <Description>SUSE Bug 1090368</Description>
    </Reference>
    <Reference Type="Self">
      <URL>https://bugzilla.suse.com/1090646</URL>
      <Description>SUSE Bug 1090646</Description>
    </Reference>
    <Reference Type="Self">
      <URL>https://bugzilla.suse.com/1090869</URL>
      <Description>SUSE Bug 1090869</Description>
    </Reference>
    <Reference Type="Self">
      <URL>https://www.suse.com/security/cve/CVE-2018-1087/</URL>
      <Description>SUSE CVE CVE-2018-1087 page</Description>
    </Reference>
    <Reference Type="Self">
      <URL>https://www.suse.com/security/cve/CVE-2018-8781/</URL>
      <Description>SUSE CVE CVE-2018-8781 page</Description>
    </Reference>
    <Reference Type="Self">
      <URL>https://www.suse.com/security/cve/CVE-2018-8897/</URL>
      <Description>SUSE CVE CVE-2018-8897 page</Description>
    </Reference>
  </DocumentReferences>
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    <Branch Type="Product Family" Name="SUSE Linux Enterprise Live Patching 12 SP3">
      <Branch Type="Product Name" Name="SUSE Linux Enterprise Live Patching 12 SP3">
        <FullProductName ProductID="SUSE Linux Enterprise Live Patching 12 SP3" CPE="cpe:/o:suse:sle-live-patching:12:sp3">SUSE Linux Enterprise Live Patching 12 SP3</FullProductName>
      </Branch>
    </Branch>
    <Branch Type="Product Version" Name="kgraft-patch-4_4_120-94_17-default-3-2.1">
      <FullProductName ProductID="kgraft-patch-4_4_120-94_17-default-3-2.1">kgraft-patch-4_4_120-94_17-default-3-2.1</FullProductName>
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      <FullProductName ProductID="SUSE Linux Enterprise Live Patching 12 SP3:kgraft-patch-4_4_120-94_17-default-3-2.1">kgraft-patch-4_4_120-94_17-default-3-2.1 as a component of SUSE Linux Enterprise Live Patching 12 SP3</FullProductName>
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    <Notes>
      <Note Title="Vulnerability Description" Type="General" Ordinal="1" xml:lang="en">kernel KVM before versions kernel 4.16, kernel 4.16-rc7, kernel 4.17-rc1, kernel 4.17-rc2 and kernel 4.17-rc3 is vulnerable to a flaw in the way the Linux kernel's KVM hypervisor handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first instruction after the stack switch is executed. An unprivileged KVM guest user could use this flaw to crash the guest or, potentially, escalate their privileges in the guest.</Note>
    </Notes>
    <CVE>CVE-2018-1087</CVE>
    <ProductStatuses>
      <Status Type="Fixed">
        <ProductID>SUSE Linux Enterprise Live Patching 12 SP3:kgraft-patch-4_4_120-94_17-default-3-2.1</ProductID>
      </Status>
    </ProductStatuses>
    <Threats>
      <Threat Type="Impact">
        <Description>important</Description>
      </Threat>
    </Threats>
    <CVSSScoreSets>
      <ScoreSetV2>
        <BaseScoreV2>4.6</BaseScoreV2>
        <VectorV2>AV:L/AC:L/Au:N/C:P/I:P/A:P</VectorV2>
      </ScoreSetV2>
      <ScoreSetV3>
        <BaseScoreV3>7.8</BaseScoreV3>
        <VectorV3>CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H</VectorV3>
      </ScoreSetV3>
    </CVSSScoreSets>
    <Remediations>
      <Remediation Type="Vendor Fix">
        <Description xml:lang="en">To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
</Description>
        <URL>https://www.suse.com/support/update/announcement/2018/suse-su-20181636-1/</URL>
      </Remediation>
    </Remediations>
    <References>
      <Reference>
        <URL>https://www.suse.com/security/cve/CVE-2018-1087.html</URL>
        <Description>CVE-2018-1087</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1087088</URL>
        <Description>SUSE Bug 1087088</Description>
      </Reference>
    </References>
  </vuln:Vulnerability>
  <vuln:Vulnerability xmlns="http://docs.oasis-open.org/csaf/ns/csaf-cvrf/v1.2/vuln" Ordinal="2">
    <Notes>
      <Note Title="Vulnerability Description" Type="General" Ordinal="1" xml:lang="en">The udl_fb_mmap function in drivers/gpu/drm/udl/udl_fb.c at the Linux kernel version 3.4 and up to and including 4.15 has an integer-overflow vulnerability allowing local users with access to the udldrmfb driver to obtain full read and write permissions on kernel physical pages, resulting in a code execution in kernel space.</Note>
    </Notes>
    <CVE>CVE-2018-8781</CVE>
    <ProductStatuses>
      <Status Type="Fixed">
        <ProductID>SUSE Linux Enterprise Live Patching 12 SP3:kgraft-patch-4_4_120-94_17-default-3-2.1</ProductID>
      </Status>
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    <Threats>
      <Threat Type="Impact">
        <Description>important</Description>
      </Threat>
    </Threats>
    <CVSSScoreSets>
      <ScoreSetV2>
        <BaseScoreV2>7.2</BaseScoreV2>
        <VectorV2>AV:L/AC:L/Au:N/C:C/I:C/A:C</VectorV2>
      </ScoreSetV2>
      <ScoreSetV3>
        <BaseScoreV3>7.8</BaseScoreV3>
        <VectorV3>CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H</VectorV3>
      </ScoreSetV3>
    </CVSSScoreSets>
    <Remediations>
      <Remediation Type="Vendor Fix">
        <Description xml:lang="en">To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
</Description>
        <URL>https://www.suse.com/support/update/announcement/2018/suse-su-20181636-1/</URL>
      </Remediation>
    </Remediations>
    <References>
      <Reference>
        <URL>https://www.suse.com/security/cve/CVE-2018-8781.html</URL>
        <Description>CVE-2018-8781</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1087082</URL>
        <Description>SUSE Bug 1087082</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1090643</URL>
        <Description>SUSE Bug 1090643</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1090646</URL>
        <Description>SUSE Bug 1090646</Description>
      </Reference>
    </References>
  </vuln:Vulnerability>
  <vuln:Vulnerability xmlns="http://docs.oasis-open.org/csaf/ns/csaf-cvrf/v1.2/vuln" Ordinal="3">
    <Notes>
      <Note Title="Vulnerability Description" Type="General" Ordinal="1" xml:lang="en">A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer's Manual (SDM) was mishandled in the development of some or all operating-system kernels, resulting in unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS, as demonstrated by (for example) privilege escalation in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux kernel crash. The MOV to SS and POP SS instructions inhibit interrupts (including NMIs), data breakpoints, and single step trap exceptions until the instruction boundary following the next instruction (SDM Vol. 3A; section 6.8.3). (The inhibited data breakpoints are those on memory accessed by the MOV to SS or POP to SS instruction itself.) Note that debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF) system flag (SDM Vol. 3A; section 2.3). If the instruction following the MOV to SS or POP to SS instruction is an instruction like SYSCALL, SYSENTER, INT 3, etc. that transfers control to the operating system at CPL &lt; 3, the debug exception is delivered after the transfer to CPL &lt; 3 is complete. OS kernels may not expect this order of events and may therefore experience unexpected behavior when it occurs.</Note>
    </Notes>
    <CVE>CVE-2018-8897</CVE>
    <ProductStatuses>
      <Status Type="Fixed">
        <ProductID>SUSE Linux Enterprise Live Patching 12 SP3:kgraft-patch-4_4_120-94_17-default-3-2.1</ProductID>
      </Status>
    </ProductStatuses>
    <Threats>
      <Threat Type="Impact">
        <Description>important</Description>
      </Threat>
    </Threats>
    <CVSSScoreSets>
      <ScoreSetV2>
        <BaseScoreV2>7.2</BaseScoreV2>
        <VectorV2>AV:L/AC:L/Au:N/C:C/I:C/A:C</VectorV2>
      </ScoreSetV2>
      <ScoreSetV3>
        <BaseScoreV3>7</BaseScoreV3>
        <VectorV3>CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H</VectorV3>
      </ScoreSetV3>
    </CVSSScoreSets>
    <Remediations>
      <Remediation Type="Vendor Fix">
        <Description xml:lang="en">To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
</Description>
        <URL>https://www.suse.com/support/update/announcement/2018/suse-su-20181636-1/</URL>
      </Remediation>
    </Remediations>
    <References>
      <Reference>
        <URL>https://www.suse.com/security/cve/CVE-2018-8897.html</URL>
        <Description>CVE-2018-8897</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1087078</URL>
        <Description>SUSE Bug 1087078</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1087088</URL>
        <Description>SUSE Bug 1087088</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1090368</URL>
        <Description>SUSE Bug 1090368</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1090820</URL>
        <Description>SUSE Bug 1090820</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1090869</URL>
        <Description>SUSE Bug 1090869</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1092497</URL>
        <Description>SUSE Bug 1092497</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1093522</URL>
        <Description>SUSE Bug 1093522</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1093524</URL>
        <Description>SUSE Bug 1093524</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1098813</URL>
        <Description>SUSE Bug 1098813</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1100835</URL>
        <Description>SUSE Bug 1100835</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1115893</URL>
        <Description>SUSE Bug 1115893</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1178658</URL>
        <Description>SUSE Bug 1178658</Description>
      </Reference>
    </References>
  </vuln:Vulnerability>
</cvrfdoc>
