xen-kernel -- some pmu and profiling hypercalls log without rate limiting

2015-10-29T00:00:00
ID E4848CA4-8820-11E5-AB94-002590263BF5
Type freebsd
Reporter FreeBSD
Modified 2015-10-29T00:00:00

Description

The Xen Project reports:

HYPERCALL_xenoprof_op and HYPERVISOR_xenpmu_op log some errors and attempts at invalid operations. These log messages are not rate-limited, even though they can be triggered by guests. A malicious guest could cause repeated logging to the hypervisor console, leading to a Denial of Service attack.