File _patchinfo of Package patchinfo.10695

<patchinfo incident="10695">
  <issue tracker="bnc" id="1126198">VUL-0: xen: XSA-292: x86: insufficient TLB flushing when using PCID</issue>
  <issue tracker="bnc" id="1026236">Paravirtualized vs. fully virtualized migration - latter one much faster</issue>
  <issue tracker="bnc" id="1126192">VUL-0: xen: XSA-287: x86: steal_page violates page_struct access discipline</issue>
  <issue tracker="bnc" id="1126201">VUL-0: xen: XSA-293: x86: PV kernel context switch corruption</issue>
  <issue tracker="bnc" id="1126196">VUL-0: xen: XSA-290: missing preemption in x86 PV page table unvalidation</issue>
  <issue tracker="bnc" id="1126195">VUL-0: EMBARGOED: xen: XSA-288: x86: Inconsistent PV IOMMU discipline</issue>
  <issue tracker="bnc" id="1114988">VUL-0: CVE-2018-19967: xen: guest use of HLE constructs may lock up host (XSA-282)</issue>
  <issue tracker="bnc" id="1123157">VUL-0: CVE-2019-6778: xen:  A heap buffer overflow in tcp_emu() found in slirp</issue>
  <issue tracker="bnc" id="1127400">VUL-0: xen: XSA-294: x86 shadow: Insufficient TLB flushing when using PCID</issue>
  <issue tracker="bnc" id="1126140">VUL-0: xen: XSA-284: grant table transfer issues on large hosts</issue>
  <issue tracker="bnc" id="1126141">VUL-0: xen: XSA-285: race with pass-through device hotplug</issue>
  <issue tracker="bnc" id="1129623">VUL-1: CVE-2019-9824: xen: information leakage in tcp_emu() due to uninitialized stack variables</issue>
  <issue tracker="cve" id="2019-6778"/>
  <issue tracker="cve" id="2019-9824"/>
  <issue tracker="cve" id="2018-19967"/>
  <category>security</category>
  <rating>important</rating>
  <packager>charlesa</packager>
  <description>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).
</description>
<summary>Security update for xen</summary>
</patchinfo>