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  <DocumentTitle xml:lang="en">Security update for xen</DocumentTitle>
  <DocumentType>SUSE Patch</DocumentType>
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        <Date>2019-04-10T07:17:50Z</Date>
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    <Note Title="Topic" Type="Summary" Ordinal="1" xml:lang="en">Security update for xen</Note>
    <Note Title="Details" Type="General" Ordinal="2" xml:lang="en">This update for xen fixes the following issues:

Security issues fixed: 

- Fixed an issue which could allow malicious PV guests may cause a host crash or 
  gain access to data pertaining to other guests.Additionally, vulnerable configurations 
  are likely to be unstable even in the absence of an attack (bsc#1126198).
- Fixed multiple access violations introduced by XENMEM_exchange hypercall which could allow 
  a single PV guest to leak arbitrary amounts of memory, leading to a denial of service (bsc#1126192).
- Fixed an issue which could allow a malicious unprivileged guest userspace process to escalate its privilege 
  to that of other userspace processes in the same guest and potentially thereby to that 
  of the guest operating system (bsc#1126201).
- Fixed an issue which could allow a malicious or buggy x86 PV guest kernels can mount a Denial of Service
  attack affecting the whole system (bsc#1126196).
- Fixed an issue which could allow an untrusted PV domain with access to a physical device to DMA into its own 
  pagetables leading to privilege escalation (bsc#1126195).
- CVE-2019-6778: Fixed a heap buffer overflow in tcp_emu() found in slirp (bsc#1123157).
- Fixed an issue which could allow malicious 64bit PV guests to cause a host crash (bsc#1127400).
- Fixed an issue which could allow malicious or buggy guests with passed through PCI devices to  be able to 
  escalate their privileges, crash the host, or access data belonging to other guests. Additionally memory 
  leaks were also possible (bsc#1126140).
- Fixed a race condition issue which could allow malicious PV guests to escalate their privilege to that 
  of the hypervisor (bsc#1126141).
- CVE-2019-9824: Fixed an information leak in SLiRP networking implementation which could allow a user/process 
  to read uninitialised stack memory contents (bsc#1129623).
- CVE-2018-19967: Fixed HLE constructs that allowed guests to lock up the host,
  resulting in a Denial of Service (DoS). (XSA-282) (bsc#1114988)

Other issue addressed: 

- Added Xen cmdline option 'suse_vtsc_tolerance' to avoid TSC emulation for HVM domUs (bsc#1026236).
</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-2019-921,SUSE-OpenStack-Cloud-7-2019-921,SUSE-SLE-SAP-12-SP2-2019-921,SUSE-SLE-SERVER-12-SP2-2019-921,SUSE-SLE-SERVER-12-SP2-BCL-2019-921,SUSE-Storage-4-2019-921</Note>
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  <DocumentDistribution xml:lang="en">Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0)</DocumentDistribution>
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      <Threat Type="Impact">
        <Description>moderate</Description>
      </Threat>
    </Threats>
    <CVSSScoreSets>
      <ScoreSetV2>
        <BaseScoreV2>4.9</BaseScoreV2>
        <VectorV2>AV:L/AC:L/Au:N/C:N/I:N/A:C</VectorV2>
      </ScoreSetV2>
      <ScoreSetV3>
        <BaseScoreV3>5.6</BaseScoreV3>
        <VectorV3>CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/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/2019/suse-su-20190921-1/</URL>
      </Remediation>
    </Remediations>
    <References>
      <Reference>
        <URL>https://www.suse.com/security/cve/CVE-2018-19967.html</URL>
        <Description>CVE-2018-19967</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1114988</URL>
        <Description>SUSE Bug 1114988</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1178658</URL>
        <Description>SUSE Bug 1178658</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">In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a heap-based buffer overflow.</Note>
    </Notes>
    <CVE>CVE-2019-6778</CVE>
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      <Threat Type="Impact">
        <Description>important</Description>
      </Threat>
    </Threats>
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      <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:H/PR:L/UI:N/S:C/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/2019/suse-su-20190921-1/</URL>
      </Remediation>
    </Remediations>
    <References>
      <Reference>
        <URL>https://www.suse.com/security/cve/CVE-2019-6778.html</URL>
        <Description>CVE-2019-6778</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1123156</URL>
        <Description>SUSE Bug 1123156</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1123157</URL>
        <Description>SUSE Bug 1123157</Description>
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      <Reference>
        <URL>https://bugzilla.suse.com/1178658</URL>
        <Description>SUSE Bug 1178658</Description>
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  <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">tcp_emu in slirp/tcp_subr.c (aka slirp/src/tcp_subr.c) in QEMU 3.0.0 uses uninitialized data in an snprintf call, leading to Information disclosure.</Note>
    </Notes>
    <CVE>CVE-2019-9824</CVE>
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      <Threat Type="Impact">
        <Description>low</Description>
      </Threat>
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    <CVSSScoreSets>
      <ScoreSetV2>
        <BaseScoreV2>2.1</BaseScoreV2>
        <VectorV2>AV:L/AC:L/Au:N/C:P/I:N/A:N</VectorV2>
      </ScoreSetV2>
      <ScoreSetV3>
        <BaseScoreV3>2.8</BaseScoreV3>
        <VectorV3>CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N</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/2019/suse-su-20190921-1/</URL>
      </Remediation>
    </Remediations>
    <References>
      <Reference>
        <URL>https://www.suse.com/security/cve/CVE-2019-9824.html</URL>
        <Description>CVE-2019-9824</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1118900</URL>
        <Description>SUSE Bug 1118900</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1129622</URL>
        <Description>SUSE Bug 1129622</Description>
      </Reference>
      <Reference>
        <URL>https://bugzilla.suse.com/1129623</URL>
        <Description>SUSE Bug 1129623</Description>
      </Reference>
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        <URL>https://bugzilla.suse.com/1178658</URL>
        <Description>SUSE Bug 1178658</Description>
      </Reference>
    </References>
  </vuln:Vulnerability>
</cvrfdoc>
