Ubuntu: (Multiple Advisories) (CVE-2020-25599): Xen vulnerabilities
Description
An issue was discovered in Xen through 4.14.x. There are evtchn_reset() race conditions. Uses of EVTCHNOP_reset (potentially by a guest on itself) or XEN_DOMCTL_soft_reset (by itself covered by XSA-77) can lead to the violation of various internal assumptions. This may lead to out of bounds memory accesses or triggering of bug checks. In particular, x86 PV guests may be able to elevate their privilege to that of the host. Host and guest crashes are also possible, leading to a Denial of Service (DoS). Information leaks cannot be ruled out. All Xen versions from 4.5 onwards are vulnerable. Xen versions 4.4 and earlier are not vulnerable.
Solution(s)
- ubuntu-upgrade-libxendevicemodel1
- ubuntu-upgrade-libxenevtchn1
- ubuntu-upgrade-libxengnttab1
- ubuntu-upgrade-libxenmisc4-11
- ubuntu-upgrade-xen-hypervisor-4-11-amd64
- ubuntu-upgrade-xen-hypervisor-4-11-arm64
- ubuntu-upgrade-xen-hypervisor-4-11-armhf
- ubuntu-upgrade-xen-utils-4-11
- ubuntu-upgrade-xen-utils-common
- ubuntu-upgrade-xenstore-utils
- Lightweight Endpoint Agent
- Live Dashboards
- Real Risk Prioritization
- IT-Integrated Remediation Projects
- Cloud, Virtual, and Container Assessment
- Integrated Threat Feeds
- Easy-to-Use RESTful API
- Automation-Assisted Patching
- Automated Containment
With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.
– Scott Cheney, Manager of Information Security, Sierra View Medical Center