CVE-2020-15564
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.
Risk Information
Associated Vulnerability
| Vulnerability | OS Platform |
|---|---|
| Public headers and libs for Xen (USN-5617-1) libxenevtchn1_4.11.3+24-g14b62ab3e5-1ubuntu2.3_amd64.deb | Linux |
| Public headers and libs for Xen (USN-5617-1) libxengnttab1_4.11.3+24-g14b62ab3e5-1ubuntu2.3_amd64.deb | Linux |
| Public headers and libs for Xen (USN-5617-1) libxenmisc4.11_4.11.3+24-g14b62ab3e5-1ubuntu2.3_amd64.deb | Linux |
| Public headers and libs for Xen (USN-5617-1) xen-utils-4.11_4.11.3+24-g14b62ab3e5-1ubuntu2.3_amd64.deb | Linux |
| Public headers and libs for Xen (USN-5617-1) xenstore-utils_4.11.3+24-g14b62ab3e5-1ubuntu2.3_amd64.deb | Linux |
| Public headers and libs for Xen (USN-5617-1) xen-utils-common_4.11.3+24-g14b62ab3e5-1ubuntu2.3_amd64.deb | Linux |
| Public headers and libs for Xen (USN-5617-1) libxendevicemodel1_4.11.3+24-g14b62ab3e5-1ubuntu2.3_amd64.deb | Linux |
| Public headers and libs for Xen (USN-5617-1) xen-hypervisor-4.11-amd64_4.11.3+24-g14b62ab3e5-1ubuntu2.3_amd64.deb | Linux |
Patch Details
No records foundReferences
https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234