Privilege escalation in Xen - CVE-2017-15594
Published: November 29, 2017
Vulnerability identifier: #VU9451
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-15594
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 or cause DoS conditions on the target system.
The weakness exists due to mishandling of IDT settings during CPU hotplugging. An adjacent attacker can gain elevated privileges or cause hypervisor crash.
The weakness exists due to mishandling of IDT settings during CPU hotplugging. An adjacent attacker can gain elevated privileges or cause hypervisor crash.
Affected software
Xen
Debian Linux
Gentoo Linux
Fedora
xen (Alpine package)
xen
Debian Linux
Gentoo Linux
Fedora
xen (Alpine package)
xen
How to mitigate CVE-2017-15594
Install update from vendor's website.
xen (Alpine package) - update to 4.6.6-r2
xen - addressed in versions 4.7.3-7.fc25, 4.7.3-9.fc25, 4.7.4-1.fc25, 4.8.2-4.fc26, 4.9.0-12.fc27, 4.9.0-14.fc27
xen - addressed in versions 4.7.3-7.fc25, 4.7.3-9.fc25, 4.7.4-1.fc25, 4.8.2-4.fc26, 4.9.0-12.fc27, 4.9.0-14.fc27