CVSS 6.5 · Medium EPSS 0,40%
Kerentanan Improper Restriction of Operations within the Bounds of a Memory Buffer pada xen, debian linux +1 lainnya. Skor CVSS 3.1 6.5 (Medium) menurut NVD.
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| xen | xen | Versi 4.8.0 hingga 4.13.1 |
| debian | debian linux | Versi 10.0 |
| fedoraproject | fedora | Versi 31 |
| fedoraproject | fedora | Versi 32 |