This vulnerability is currently awaiting analysis.
Description
An issue was discovered in Xen through 4.13.x, allowing Arm guest OS users to cause a hypervisor crash because of a missing alignment check in VCPUOP_register_vcpu_info. The hypercall VCPUOP_register_vcpu_info is used by a guest to register a shared region with the hypervisor. The region will be mapped into Xen address space so it can be directly accessed. On Arm, the region is accessed with instructions that require a specific alignment. Unfortunately, there is no check that the address provided by the guest will be correctly aligned. As a result, a malicious guest could cause a hypervisor crash by passing a misaligned address. A malicious guest administrator may cause a hypervisor crash, resulting in a Denial of Service (DoS). All Xen versions are vulnerable. Only Arm systems are vulnerable. x86 systems are not affected.
Severity
References to Advisories, Solutions, and Tools
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Weakness Enumeration
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Change History
1 change records found show changes
CVE Modified by MITRE 7/07/2020 11:15:11 AM
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http://www.openwall.com/lists/oss-security/2020/07/07/5 [No Types Assigned] |