cve-2020-15564
Vulnerability from cvelistv5
Published
2020-07-07 12:25
Modified
2024-08-04 13:22
Severity ?
Summary
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.
References
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2020/07/07/5Mailing List, Patch, Third Party Advisory
cve@mitre.orghttp://xenbits.xen.org/xsa/advisory-327.htmlPatch, Third Party Advisory
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MXESCOVI7AVRNC7HEAMFM7PMEO6D3AUH/
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VB3QJJZV23Z2IDYEMIHELWYSQBUEW6JP/
cve@mitre.orghttps://security.gentoo.org/glsa/202007-02Third Party Advisory
cve@mitre.orghttps://www.debian.org/security/2020/dsa-4723Third Party Advisory
Impacted products
n/an/a
Show details on NVD website

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