CVE-2019-18424

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Summary

CVECVE-2019-18424
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-10-31 14:15:00 UTC
Updated2023-11-07 03:06:00 UTC
DescriptionAn issue was discovered in Xen through 4.12.x allowing attackers to gain host OS privileges via DMA in a situation where an untrusted domain has access to a physical device. This occurs because passed through PCI devices may corrupt host memory after deassignment. When a PCI device is assigned to an untrusted domain, it is possible for that domain to program the device to DMA to an arbitrary address. The IOMMU is used to protect the host from malicious DMA by making sure that the device addresses can only target memory assigned to the guest. However, when the guest domain is torn down, or the device is deassigned, the device is assigned back to dom0, thus allowing any in-flight DMA to potentially target critical host data. An untrusted domain with access to a physical device can DMA into host memory, leading to privilege escalation. Only systems where guests are given direct access to physical devices capable of DMA (PCI pass-through) are vulnerable. Systems which do not use PCI pass-through are not vulnerable.

Risk And Classification

Problem Types: CWE-78

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 9.0 All All All
Operating System Fedoraproject Fedora 29 All All All
Operating System Fedoraproject Fedora 30 All All All
Operating System Fedoraproject Fedora 31 All All All
Operating System Opensuse Leap 15.0 All All All
Operating System Xen Xen All All All All

References

ReferenceSourceLinkTags
Debian -- Security Information -- DSA-4602-1 xen DEBIAN www.debian.org
Xen: Multiple vulnerabilities (GLSA 202003-56) — Gentoo security GENTOO security.gentoo.org
[SECURITY] Fedora 30 Update: xen-4.11.2-3.fc30 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
[SECURITY] Fedora 29 Update: xen-4.11.2-2.fc29 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
[SECURITY] Fedora 29 Update: xen-4.11.2-2.fc29 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
oss-security - Xen Security Advisory 302 v5 (CVE-2019-18424) - passed through PCI devices may corrupt host memory after deassignment MLIST www.openwall.com Mailing List, Mitigation, Third Party Advisory
Bugtraq: [SECURITY] [DSA 4602-1] xen security update BUGTRAQ seclists.org
[security-announce] openSUSE-SU-2019:2506-1: important: Security update SUSE lists.opensuse.org
[SECURITY] Fedora 31 Update: xen-4.12.1-6.fc31 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
XSA-302 - Xen Security Advisories MISC xenbits.xen.org Mitigation, Patch, Vendor Advisory
[SECURITY] Fedora 31 Update: xen-4.12.1-6.fc31 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
[SECURITY] Fedora 30 Update: xen-4.11.2-3.fc30 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 500754 Alpine Linux Security Update for xen
  • 504531 Alpine Linux Security Update for xen
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