Vulnerability identifier: #VU48639
Vulnerability risk: Medium
CVSSv3.1: 6.2 [CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-193
Exploitation vector: Local network
Exploit availability: No
Vulnerable software:
Xen
Server applications /
Virtualization software
Vendor: Xen Project
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to an off-by-one error. A local user on the HVM or PVH system can run a specially crafted program on the guest OS, trigger an off-by-one error and execute arbitrary code on the hypervisor.
Note, the vulnerability exists due to incorrect patch of vulnerability #VU48638.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Xen: 4.2.0 - 4.14.0
External links
http://xenbits.xen.org/xsa/advisory-355.html
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.