CVE-2020-7211

This update for xen fixes the following issues:

• CVE-2020-7211: potential directory traversal using relative paths via tftp server on Windows host (bsc#1161181).
• CVE-2019-19579: Device quarantine for alternate pci assignment methods (bsc#1157888).
• CVE-2019-19581: find_next_bit() issues (bsc#1158003).
• CVE-2019-19583: VMentry failure with debug exceptions and blocked states (bsc#1158004).
• CVE-2019-19578: Linear pagetable use / entry miscounts (bsc#1158005).
• CVE-2019-19580: Further issues with restartable PV type change operations (bsc#1158006).
• CVE-2019-19577: dynamic height for the IOMMU pagetables (bsc#1158007).
• CVE-2019-18420: VCPUOP_initialise DoS (bsc#1154448).
• CVE-2019-18425: missing descriptor table limit checking in x86 PV emulation (bsc#1154456).
• CVE-2019-18421: Issues with restartable PV type change operations (bsc#1154458).
• CVE-2019-18424: passed through PCI devices may corrupt host memory after deassignment (bsc#1154461).
• CVE-2018-12207: Machine Check Error Avoidance on Page Size Change (aka IFU issue) (bsc#1155945).
• CVE-2019-11135: TSX Asynchronous Abort (TAA) issue (bsc#1152497).

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).

This update for xen fixes the following issues:

Security issues fixed:

• CVE-2020-11742: Bad continuation handling in GNTTABOP_copy (bsc#1169392).
• CVE-2020-11740, CVE-2020-11741: xen: XSA-313 multiple xenoprof issues (bsc#1168140).
• CVE-2020-11739: Missing memory barriers in read-write unlock paths (bsc#1168142).
• CVE-2020-11743: Bad error path in GNTTABOP_map_grant (bsc#1168143).
• CVE-2020-7211: Fixed potential directory traversal using relative paths via tftp server on Windows host (bsc#1161181).
• arm: a CPU may speculate past the ERET instruction (bsc#1160932).

Non-security issues fixed:

• Xenstored Crashed during VM install (bsc#1167152)
• DomU hang: soft lockup CPU #0 stuck under high load (bsc#1165206, bsc#1134506)
• Update API compatibility versions, fixes issues for libvirt. (bsc#1167007, bsc#1157490)
• aacraid blocks xen commands (bsc#1155200)

This update for xen to version 4.12.2 fixes the following issues:

Security issues fixed:

• CVE-2020-11742: Bad continuation handling in GNTTABOP_copy (bsc#1169392).
• CVE-2020-11740, CVE-2020-11741: xen: XSA-313 multiple xenoprof issues (bsc#1168140).
• CVE-2020-11739: Missing memory barriers in read-write unlock paths (bsc#1168142).
• CVE-2020-11743: Bad error path in GNTTABOP_map_grant (bsc#1168143).
• CVE-2020-7211: Fixed potential directory traversal using relative paths via tftp server on Windows host (bsc#1161181).
• arm: a CPU may speculate past the ERET instruction (bsc#1160932).

Non-security issues fixed:

• Xenstored Crashed during VM install (bsc#1167152)
• DomU hang: soft lockup CPU #0 stuck under high load (bsc#1165206, bsc#1134506)
• Update API compatibility versions, fixes issues for libvirt. (bsc#1167007, bsc#1157490)
• aacraid blocks xen commands (bsc#1155200)
• Problems Booting Fedora31 VM on sles15 sp1 Xen Dom0 (bsc#1162040).

This update for xen fixes the following issues:

• bsc#1174543 - secure boot related fixes
• bsc#1163019 - CVE-2020-8608: potential OOB access due to unsafe snprintf() usages
• bsc#1169392 - CVE-2020-11742: Bad continuation handling in GNTTABOP_copy
• bsc#1168140 - CVE-2020-11740, CVE-2020-11741: multiple xenoprof issues
• bsc#1161181 - CVE-2020-7211: potential directory traversal using relative paths via tftp server on Windows host
• bsc#1157888 - CVE-2019-19579: Device quarantine for alternate pci assignment methods
• bsc#1158004 - CVE-2019-19583: VMX: VMentry failure with debug exceptions and blocked states
• bsc#1158005 - CVE-2019-19578: Linear pagetable use / entry miscounts
• bsc#1158006 - CVE-2019-19580: Further issues with restartable PV type change operations
• bsc#1158007 - CVE-2019-19577: dynamic height for the IOMMU pagetables
• bsc#1154448 - CVE-2019-18420: VCPUOP_initialise DoS
• bsc#1154456 - CVE-2019-18425: missing descriptor table limit checking in x86 PV emulation
• bsc#1154458 - CVE-2019-18421: Issues with restartable PV type change operations
• bsc#1154461 - CVE-2019-18424: passed through PCI devices may corrupt host memory after deassignment
• bsc#1155945 - CVE-2018-12207: Machine Check Error Avoidance on Page Size Change (aka IFU issue)
• bsc#1152497 - CVE-2019-11135: TSX Asynchronous Abort (TAA) issue

This update for xen fixes the following issues:

• bsc#1174543 - secure boot related fixes
• bsc#1163019 - CVE-2020-8608: potential OOB access due to unsafe snprintf() usages
• bsc#1169392 - CVE-2020-11742: Bad continuation handling in GNTTABOP_copy
• bsc#1168140 - CVE-2020-11740, CVE-2020-11741: multiple xenoprof issues
• bsc#1161181 - CVE-2020-7211: potential directory traversal using relative paths via tftp server on Windows host
• bsc#1154456 - CVE-2019-18425: missing descriptor table limit checking in x86 PV emulation
• bsc#1154458 - CVE-2019-18421: Issues with restartable PV type change operations

This update for xen fixes the following issues:

• CVE-2020-0543: Fixed a side channel attack against special registers which could have resulted in leaking of read values to cores other than the one which called it. This attack is known as Special Register Buffer Data Sampling (SRBDS) or 'CrossTalk' (bsc#1172205).
• CVE-2020-11742: Bad continuation handling in GNTTABOP_copy (bsc#1169392).
• CVE-2020-11740, CVE-2020-11741: xen: XSA-313 multiple xenoprof issues (bsc#1168140).
• CVE-2020-11739: Missing memory barriers in read-write unlock paths (bsc#1168142).
• 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).
• CVE-2019-19581: Fixed a potential out of bounds on 32-bit Arm (bsc#1158003 XSA-307).
• 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-2019-19579: Fixed a privilege escalation where an untrusted domain with access to a physical device can DMA into host memory (bsc#1157888 XSA-306).
• CVE-2019-19578: 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-2019-19577: 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).
• Xenstored Crashed during VM install (bsc#1167152)