Privilege escalation in Xen - CVE-2018-19962
Published: December 17, 2018
Vulnerability identifier: #VU16562
CSH Severity: Low
CVSS v4: 8.7 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-19962
CWE-ID: CWE-264
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an adjacent attacker to gain elevated privileges on the target system.
The weakness exists on AMD x86 platforms due to small IOMMU mappings are unsafely combined into larger ones. An adjacent attacker can gain host OS privileges.
The weakness exists on AMD x86 platforms due to small IOMMU mappings are unsafely combined into larger ones. An adjacent attacker can gain host OS privileges.
Affected software
Xen
xen (Alpine package)
xen (Debian package)
xen
Opensuse
Fedora
xen (Alpine package)
xen (Debian package)
xen
Opensuse
Fedora
How to mitigate CVE-2018-19962
Install update from vendor's website.
xen (Alpine package) - update to 4.9.3-r1
xen (Debian package) - update to 4.8.5+shim4.10.2+xsa282-1+deb9u11
xen - addressed in versions 4.10.2-4.fc28, 4.10.3-1.fc28, 4.10.3-2.fc28, 4.11.0-10.fc29
xen (Debian package) - update to 4.8.5+shim4.10.2+xsa282-1+deb9u11
xen - addressed in versions 4.10.2-4.fc28, 4.10.3-1.fc28, 4.10.3-2.fc28, 4.11.0-10.fc29