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  • Keyword (text search): cpe:2.3:o:xen:xen:4.7.1:*:*:*:*:*:arm:*
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There are 125 matching records.
Displaying matches 61 through 80.
Vuln ID Summary CVSS Severity
CVE-2018-15468

An issue was discovered in Xen through 4.11.x. The DEBUGCTL MSR contains several debugging features, some of which virtualise cleanly, but some do not. In particular, Branch Trace Store is not virtualised by the processor, and software has to be careful to configure it suitably not to lock up the core. As a result, it must only be available to fully trusted guests. Unfortunately, in the case that vPMU is disabled, all value checking was skipped, allowing the guest to choose any MSR_DEBUGCTL setting it likes. A malicious or buggy guest administrator (on Intel x86 HVM or PVH) can lock up the entire host, causing a Denial of Service.

Published: August 17, 2018; 2:29:00 PM -0400
V3.0: 6.0 MEDIUM
V2.0: 4.9 MEDIUM
CVE-2018-14678

An issue was discovered in the Linux kernel through 4.17.11, as used in Xen through 4.11.x. The xen_failsafe_callback entry point in arch/x86/entry/entry_64.S does not properly maintain RBX, which allows local users to cause a denial of service (uninitialized memory usage and system crash). Within Xen, 64-bit x86 PV Linux guest OS users can trigger a guest OS crash or possibly gain privileges.

Published: July 28, 2018; 2:29:00 PM -0400
V3.0: 7.8 HIGH
V2.0: 7.2 HIGH
CVE-2017-2620

Quick emulator (QEMU) before 2.8 built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. The issue could occur while copying VGA data in cirrus_bitblt_cputovideo. A privileged user inside guest could use this flaw to crash the QEMU process OR potentially execute arbitrary code on host with privileges of the QEMU process.

Published: July 27, 2018; 3:29:00 PM -0400
V3.0: 9.9 CRITICAL
V2.0: 9.0 HIGH
CVE-2017-2615

Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS or potentially execute arbitrary code on the host with privileges of QEMU process on the host.

Published: July 02, 2018; 9:29:00 PM -0400
V3.0: 9.1 CRITICAL
V2.0: 9.0 HIGH
CVE-2018-12892

An issue was discovered in Xen 4.7 through 4.10.x. libxl fails to pass the readonly flag to qemu when setting up a SCSI disk, due to what was probably an erroneous merge conflict resolution. Malicious guest administrators or (in some situations) users may be able to write to supposedly read-only disk images. Only emulated SCSI disks (specified as "sd" in the libxl disk configuration, or an equivalent) are affected. IDE disks ("hd") are not affected (because attempts to make them readonly are rejected). Additionally, CDROM devices (that is, devices specified to be presented to the guest as CDROMs, regardless of the nature of the backing storage on the host) are not affected; they are always read only. Only systems using qemu-xen (rather than qemu-xen-traditional) as the device model version are vulnerable. Only systems using libxl or libxl-based toolstacks are vulnerable. (This includes xl, and libvirt with the libxl driver.) The vulnerability is present in Xen versions 4.7 and later. (In earlier versions, provided that the patch for XSA-142 has been applied, attempts to create read only disks are rejected.) If the host and guest together usually support PVHVM, the issue is exploitable only if the malicious guest administrator has control of the guest kernel or guest kernel command line.

Published: July 02, 2018; 1:29:00 PM -0400
V3.0: 9.9 CRITICAL
V2.0: 6.5 MEDIUM
CVE-2018-12891

An issue was discovered in Xen through 4.10.x. Certain PV MMU operations may take a long time to process. For that reason Xen explicitly checks for the need to preempt the current vCPU at certain points. A few rarely taken code paths did bypass such checks. By suitably enforcing the conditions through its own page table contents, a malicious guest may cause such bypasses to be used for an unbounded number of iterations. A malicious or buggy PV guest may cause a Denial of Service (DoS) affecting the entire host. Specifically, it may prevent use of a physical CPU for an indeterminate period of time. All Xen versions from 3.4 onwards are vulnerable. Xen versions 3.3 and earlier are vulnerable to an even wider class of attacks, due to them lacking preemption checks altogether in the affected code paths. Only x86 systems are affected. ARM systems are not affected. Only multi-vCPU x86 PV guests can leverage the vulnerability. x86 HVM or PVH guests as well as x86 single-vCPU PV ones cannot leverage the vulnerability.

Published: July 02, 2018; 1:29:00 PM -0400
V3.0: 6.5 MEDIUM
V2.0: 4.9 MEDIUM
CVE-2018-10981

An issue was discovered in Xen through 4.10.x allowing x86 HVM guest OS users to cause a denial of service (host OS infinite loop) in situations where a QEMU device model attempts to make invalid transitions between states of a request.

Published: May 10, 2018; 6:29:00 PM -0400
V3.0: 6.5 MEDIUM
V2.0: 4.9 MEDIUM
CVE-2018-10471

An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (out-of-bounds zero write and hypervisor crash) via unexpected INT 80 processing, because of an incorrect fix for CVE-2017-5754.

Published: April 27, 2018; 11:29:00 AM -0400
V3.0: 6.5 MEDIUM
V2.0: 4.9 MEDIUM
CVE-2018-7541

An issue was discovered in Xen through 4.10.x allowing guest OS users to cause a denial of service (hypervisor crash) or gain privileges by triggering a grant-table transition from v2 to v1.

Published: February 27, 2018; 2:29:00 PM -0500
V3.0: 8.8 HIGH
V2.0: 6.1 MEDIUM
CVE-2018-7540

An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (host OS CPU hang) via non-preemptable L3/L4 pagetable freeing.

Published: February 27, 2018; 2:29:00 PM -0500
V3.0: 6.5 MEDIUM
V2.0: 4.9 MEDIUM
CVE-2017-17566

An issue was discovered in Xen through 4.9.x allowing PV guest OS users to cause a denial of service (host OS crash) or gain host OS privileges in shadow mode by mapping a certain auxiliary page.

Published: December 12, 2017; 6:29:00 PM -0500
V3.0: 7.8 HIGH
V2.0: 6.9 MEDIUM
CVE-2017-17565

An issue was discovered in Xen through 4.9.x allowing PV guest OS users to cause a denial of service (host OS crash) if shadow mode and log-dirty mode are in place, because of an incorrect assertion related to M2P.

Published: December 12, 2017; 6:29:00 PM -0500
V3.0: 5.6 MEDIUM
V2.0: 4.7 MEDIUM
CVE-2017-17564

An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging incorrect error handling for reference counting in shadow mode.

Published: December 12, 2017; 6:29:00 PM -0500
V3.0: 7.8 HIGH
V2.0: 6.9 MEDIUM
CVE-2017-17563

An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging an incorrect mask for reference-count overflow checking in shadow mode.

Published: December 12, 2017; 6:29:00 PM -0500
V3.0: 7.8 HIGH
V2.0: 6.9 MEDIUM
CVE-2017-17046

An issue was discovered in Xen through 4.9.x on the ARM platform allowing guest OS users to obtain sensitive information from DRAM after a reboot, because disjoint blocks, and physical addresses that do not start at zero, are mishandled.

Published: November 28, 2017; 6:29:00 PM -0500
V3.0: 6.5 MEDIUM
V2.0: 2.1 LOW
CVE-2017-17045

An issue was discovered in Xen through 4.9.x allowing HVM guest OS users to gain privileges on the host OS, obtain sensitive information, or cause a denial of service (BUG and host OS crash) by leveraging the mishandling of Populate on Demand (PoD) Physical-to-Machine (P2M) errors.

Published: November 28, 2017; 6:29:00 PM -0500
V3.0: 8.8 HIGH
V2.0: 7.2 HIGH
CVE-2017-17044

An issue was discovered in Xen through 4.9.x allowing HVM guest OS users to cause a denial of service (infinite loop and host OS hang) by leveraging the mishandling of Populate on Demand (PoD) errors.

Published: November 28, 2017; 6:29:00 PM -0500
V3.0: 6.5 MEDIUM
V2.0: 4.9 MEDIUM
CVE-2017-15596

An issue was discovered in Xen 4.4.x through 4.9.x allowing ARM guest OS users to cause a denial of service (prevent physical CPU usage) because of lock mishandling upon detection of an add-to-physmap error.

Published: October 18, 2017; 4:29:00 AM -0400
V3.0: 6.0 MEDIUM
V2.0: 4.9 MEDIUM
CVE-2017-15595

An issue was discovered in Xen through 4.9.x allowing x86 PV guest OS users to cause a denial of service (unbounded recursion, stack consumption, and hypervisor crash) or possibly gain privileges via crafted page-table stacking.

Published: October 18, 2017; 4:29:00 AM -0400
V3.0: 8.8 HIGH
V2.0: 7.2 HIGH
CVE-2017-15594

An issue was discovered in Xen through 4.9.x allowing x86 SVM PV guest OS users to cause a denial of service (hypervisor crash) or gain privileges because IDT settings are mishandled during CPU hotplugging.

Published: October 18, 2017; 4:29:00 AM -0400
V3.0: 8.8 HIGH
V2.0: 4.6 MEDIUM