CVE-2019-17347

An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service or gain privileges because a guest can manipulate its virtualised %cr4 in a way that is incompatible with Linux (and possibly other guest kernels).

An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service or gain privileges because a guest can manipulate its virtualised %cr4 in a way that is incompatible with Linux (and possibly other guest kernels).

This update for xen to version 4.10.4 fixes the following issues:

• Fixed an issue where libxenlight could not restore domain vsa6535522 on live migration (bsc#1133818).
• Fixed an HPS bug which did not allow to install Windows Server 2016 with 2 CPUs setting or above (bsc#1137717).
• Fixed an issue where libxenlight could not create new domain (bsc#1131811).
• Fixed an issue where Xen could not pre-allocate 1 shadow page (bsc#1145240).
• Fixed an issue where attached pci devices were lost after reboot (bsc#1129642).
• Fixed a segmentation fault in Libvrtd during live migration to a VM (bsc#1145774).
• Xenpvnetboot is now ported correctly to Python 3 (bsc#1138563).

This update for xen fixes the following issues:

• CVE-2019-15890: Fixed a use-after-free in SLiRP networking implementation of QEMU emulator which could have led to Denial of Service (bsc#1149813).
• CVE-2019-12068: Fixed an issue in lsi which could lead to an infinite loop and denial of service (bsc#1146874).
• CVE-2019-14378: Fixed a heap buffer overflow in SLiRp networking implementation of QEMU emulator which could have led to execution of arbitrary code with privileges of the QEMU process (bsc#1143797).
• CVE-2019-12067: Fixed a null pointer dereference which could have led to denial of service (bsc#1145652).
• CVE-2019-12155: Fixed a null pointer dereference in QXL VGA card emulator of QEMU which could have led to denial of service (bsc#1135905).

This update for xen to version 4.11.2 fixes the following issues:

Security issues fixed:

• CVE-2019-15890: Fixed a use-after-free in SLiRP networking implementation of QEMU emulator which could have led to Denial of Service (bsc#1149813).
• CVE-2019-12068: Fixed an issue in lsi which could lead to an infinite loop and denial of service (bsc#1146874).
• CVE-2019-14378: Fixed a heap buffer overflow in SLiRp networking implementation of QEMU emulator which could have led to execution of arbitrary code with privileges of the QEMU process (bsc#1143797).

Other issues fixed:

• Fixed an HPS bug which did not allow to install Windows Server 2016 with 2 CPUs setting or above (bsc#1137717).
• Fixed a segmentation fault in Libvrtd during live migration to a VM (bsc#1145774).
• Fixed an issue where libxenlight could not create new domain (bsc#1131811).
• Fixed an issue where attached pci devices were lost after reboot (bsc#1129642).
• Fixed an issue where Xen could not pre-allocate 1 shadow page (bsc#1145240).

This update for xen fixes the following issues:

Security issues fixed:

• CVE-2019-15890: Fixed a use-after-free in SLiRP networking implementation of QEMU emulator which could have led to Denial of Service (bsc#1149813).
• CVE-2019-12068: Fixed an issue in lsi which could lead to an infinite loop and denial of service (bsc#1146874).
• CVE-2019-14378: Fixed a heap buffer overflow in SLiRp networking implementation of QEMU emulator which could have led to execution of arbitrary code with privileges of the QEMU process (bsc#1143797).

Other issue fixed:

• Fixed an issue where libxenlight could not restore domain vsa6535522 on live migration (bsc#1133818).

This update for xen fixes the following issues:

• CVE-2019-15890: Fixed a use-after-free in SLiRP networking implementation of QEMU emulator which could have led to Denial of Service (bsc#1149813).
• CVE-2019-12068: Fixed an issue in lsi which could lead to an infinite loop and denial of service (bsc#1146874).
• CVE-2019-14378: Fixed a heap buffer overflow in SLiRp networking implementation of QEMU emulator which could have led to execution of arbitrary code with privileges of the QEMU process (bsc#1143797).

This update for xen fixes the following issues:

• CVE-2018-12207: Fixed a race condition where untrusted virtual machines could have been using the Instruction Fetch Unit of the Intel CPU to cause a Machine Exception during Page Size Change, causing the CPU core to be non-functional (bsc#1155945 XSA-304).
• CVE-2018-19965: Fixed a DoS from attempting to use INVPCID with a non-canonical addresses (bsc#1115045 XSA-279).
• CVE-2019-11135: Aborting an asynchronous TSX operation on Intel CPUs with Transactional Memory support could be used to facilitate side-channel information leaks out of microarchitectural buffers, similar to the previously described 'Microarchitectural Data Sampling' attack. (bsc#1152497 XSA-305).
• CVE-2019-12067: Fixed a null pointer dereference in QEMU AHCI (bsc#1145652).
• CVE-2019-12068: Fixed an infinite loop while executing script (bsc#1146874).
• CVE-2019-12155: Fixed a null pointer dereference while releasing spice resources (bsc#1135905).
• CVE-2019-14378: Fixed a heap buffer overflow during packet reassembly in slirp networking implementation (bsc#1143797).
• CVE-2019-15890: Fixed a use-after-free during packet reassembly (bsc#1149813).
• CVE-2019-17340: Fixed grant table transfer issues on large hosts (XSA-284 bsc#1126140).
• CVE-2019-17341: Fixed a race with pass-through device hotplug (XSA-285 bsc#1126141).
• CVE-2019-17342: Fixed steal_page violating page_struct access discipline (XSA-287 bsc#1126192).
• CVE-2019-17343: Fixed an inconsistent PV IOMMU discipline (XSA-288 bsc#1126195).
• CVE-2019-17344: Fixed a missing preemption in x86 PV page table unvalidation (XSA-290 bsc#1126196).
• CVE-2019-17347: Fixed a PV kernel context switch corruption (XSA-293 bsc#1126201).
• CVE-2019-18420: Fixed a hypervisor crash that could be caused by malicious x86 PV guests, resulting in a denial of service (bsc#1154448 XSA-296).
• CVE-2019-18421: Fixed a privilege escalation through malicious PV guest administrators (bsc#1154458 XSA-299).
• CVE-2019-18424: Fixed a privilege escalation through DMA to physical devices by untrusted domains (bsc#1154461 XSA-302).
• CVE-2019-18425: Fixed a privilege escalation from 32-bit PV guest used mode (bsc#1154456 XSA-298).
• CVE-2019-19577: Fixed an issue where a malicious guest administrator could have caused Xen to access data structures while they are being modified leading to a crash (bsc#1158007 XSA-311).
• CVE-2019-19578: Fixed an issue where a malicious or buggy PV guest could have caused hypervisor crash resulting in denial of service affecting the entire host (bsc#1158005 XSA-309).
• CVE-2019-19579: Fixed a privilege escalation where an untrusted domain with access to a physical device can DMA into host memory (bsc#1157888 XSA-306).
• CVE-2019-19580: Fixed a privilege escalation where a malicious PV guest administrator could have been able to escalate their privilege to that of the host (bsc#1158006 XSA-310).
• CVE-2019-19581: Fixed a potential out of bounds on 32-bit Arm (bsc#1158003 XSA-307).
• CVE-2019-19583: Fixed improper checks which could have allowed HVM/PVH guest userspace code to crash the guest, leading to a guest denial of service (bsc#1158004 XSA-308).