CVE-2011-4347

Description

The kvm_vm_ioctl_assign_device function in virt/kvm/assigned-dev.c in the KVM subsystem in the Linux kernel before 3.1.10 does not verify permission to access PCI configuration space and BAR resources, which allows host OS users to assign PCI devices and cause a denial of service (host OS crash) via a KVM_ASSIGN_PCI_DEVICE operation.

CVSS Metrics

• v2.0•MEDIUM•Score: 4AV:L/AC:H/Au:N/C:N/I:N/A:C

EPSS Trends

Current EPSS score: 0.07%• Percentile: 21%

Techniques & Countermeasures

• CWE-264•Permissions, Privileges, and Access Controls

  Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.

Affected Systems

• linux•linux_kernel

  ≤ 3.1.9 | 3.1.1 | 3.12 | 3.13 | 3.14 | 3.15 | 3.16 | 3.17 | 3.18

References (4)

• http://www.openwall.com/lists/oss-security/2011/11/24/7
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1.10
• https://bugzilla.redhat.com/show_bug.cgi?id=756084
• https://github.com/torvalds/linux/commit/c4e7f9022e506c6635a5037713c37118e23193e4