CVE-2014-0155

Description

The ioapic_deliver function in virt/kvm/ioapic.c in the Linux kernel through 3.14.1 does not properly validate the kvm_irq_delivery_to_apic return value, which allows guest OS users to cause a denial of service (host OS crash) via a crafted entry in the redirection table of an I/O APIC. NOTE: the affected code was moved to the ioapic_service function before the vulnerability was announced.

CVSS Metrics

• v2.0•MEDIUM•Score: 5.5AV:A/AC:L/Au:S/C:N/I:N/A:C

EPSS Trends

Current EPSS score: 0.07%• Percentile: 21%

Techniques & Countermeasures

• CWE-20•Improper Input Validation

  The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Affected Systems

• linux•linux_kernel

  < 3.14.1

References (3)

• http://git.kernel.org/cgit/virt/kvm/kvm.git/commit/?id=5678de3f15010b9022ee45673f33bcfc71d47b60
• https://bugzilla.redhat.com/show_bug.cgi?id=1081589
• http://www.openwall.com/lists/oss-security/2014/04/07/2