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  <DocumentTitle xml:lang="en">Security update for the Linux Kernel (Live Patch 25 for SLE 12 SP2)</DocumentTitle>
  <DocumentType>SUSE Patch</DocumentType>
  <DocumentPublisher Type="Vendor">
    <ContactDetails>security@suse.de</ContactDetails>
    <IssuingAuthority>SUSE Security Team</IssuingAuthority>
  </DocumentPublisher>
  <DocumentTracking>
    <Identification>
      <ID>SUSE-SU-2018:3470-1</ID>
    </Identification>
    <Status>Final</Status>
    <Version>1</Version>
    <RevisionHistory>
      <Revision>
        <Number>1</Number>
        <Date>2018-10-25T18:09:54Z</Date>
        <Description>current</Description>
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    <InitialReleaseDate>2018-10-25T18:09:54Z</InitialReleaseDate>
    <CurrentReleaseDate>2018-10-25T18:09:54Z</CurrentReleaseDate>
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      <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 25 for SLE 12 SP2)</Note>
    <Note Title="Details" Type="General" Ordinal="2" xml:lang="en">This update for the Linux Kernel 4.4.121-92_95 fixes several issues.

The following security issues were fixed:

- CVE-2018-14633: A security flaw was found in the chap_server_compute_md5() function in the ISCSI target code in a way an authentication request from an ISCSI initiator is processed. An unauthenticated remote attacker can cause a stack buffer overflow and smash up to 17 bytes of the stack. The attack requires the iSCSI target to be enabled on the victim host. Depending on how the target's code was built (i.e. depending on a compiler, compile flags and hardware architecture) an attack may lead to a system crash and thus to a denial-of-service or possibly to a non-authorized access to data exported by an iSCSI target. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is highly unlikely. (bsc#1107832).
- CVE-2018-5390: The Linux kernel could be forced to make very expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() for every incoming packet which can lead to a denial of service (bsc#1102682).
</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-SAP-12-SP2-2018-2483,SUSE-SLE-SERVER-12-SP2-2018-2483</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-20183470-1/</URL>
      <Description>Link for SUSE-SU-2018:3470-1</Description>
    </Reference>
    <Reference Type="Self">
      <URL>https://lists.suse.com/pipermail/sle-security-updates/2018-October/004796.html</URL>
      <Description>E-Mail link for SUSE-SU-2018:3470-1</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/1102682</URL>
      <Description>SUSE Bug 1102682</Description>
    </Reference>
    <Reference Type="Self">
      <URL>https://bugzilla.suse.com/1107832</URL>
      <Description>SUSE Bug 1107832</Description>
    </Reference>
    <Reference Type="Self">
      <URL>https://www.suse.com/security/cve/CVE-2018-14633/</URL>
      <Description>SUSE CVE CVE-2018-14633 page</Description>
    </Reference>
    <Reference Type="Self">
      <URL>https://www.suse.com/security/cve/CVE-2018-5390/</URL>
      <Description>SUSE CVE CVE-2018-5390 page</Description>
    </Reference>
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    <Notes>
      <Note Title="Vulnerability Description" Type="General" Ordinal="1" xml:lang="en">A security flaw was found in the chap_server_compute_md5() function in the ISCSI target code in the Linux kernel in a way an authentication request from an ISCSI initiator is processed. An unauthenticated remote attacker can cause a stack buffer overflow and smash up to 17 bytes of the stack. The attack requires the iSCSI target to be enabled on the victim host. Depending on how the target's code was built (i.e. depending on a compiler, compile flags and hardware architecture) an attack may lead to a system crash and thus to a denial-of-service or possibly to a non-authorized access to data exported by an iSCSI target. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is highly unlikely. Kernel versions 4.18.x, 4.14.x and 3.10.x are believed to be vulnerable.</Note>
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    <CVE>CVE-2018-14633</CVE>
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        <Description>important</Description>
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      <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-20183470-1/</URL>
      </Remediation>
    </Remediations>
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        <URL>https://www.suse.com/security/cve/CVE-2018-14633.html</URL>
        <Description>CVE-2018-14633</Description>
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      <Reference>
        <URL>https://bugzilla.suse.com/1107829</URL>
        <Description>SUSE Bug 1107829</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1107832</URL>
        <Description>SUSE Bug 1107832</Description>
      </Reference>
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      <Note Title="Vulnerability Description" Type="General" Ordinal="1" xml:lang="en">Linux kernel versions 4.9+ can be forced to make very expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() for every incoming packet which can lead to a denial of service.</Note>
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    <CVE>CVE-2018-5390</CVE>
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        <ProductID>SUSE Linux Enterprise Server 12 SP2-LTSS:kgraft-patch-4_4_121-92_95-default-2-2.1</ProductID>
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        <BaseScoreV3>7.5</BaseScoreV3>
        <VectorV3>CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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-20183470-1/</URL>
      </Remediation>
    </Remediations>
    <References>
      <Reference>
        <URL>https://www.suse.com/security/cve/CVE-2018-5390.html</URL>
        <Description>CVE-2018-5390</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1087082</URL>
        <Description>SUSE Bug 1087082</Description>
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      <Reference>
        <URL>https://bugzilla.suse.com/1102340</URL>
        <Description>SUSE Bug 1102340</Description>
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      <Reference>
        <URL>https://bugzilla.suse.com/1102682</URL>
        <Description>SUSE Bug 1102682</Description>
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      <Reference>
        <URL>https://bugzilla.suse.com/1103097</URL>
        <Description>SUSE Bug 1103097</Description>
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      <Reference>
        <URL>https://bugzilla.suse.com/1103098</URL>
        <Description>SUSE Bug 1103098</Description>
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      <Reference>
        <URL>https://bugzilla.suse.com/1156434</URL>
        <Description>SUSE Bug 1156434</Description>
      </Reference>
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