Vulnerability identifier: #VU49940
Vulnerability risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-345
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Xen
Server applications /
Virtualization software
Vendor: Xen Project
Description
The vulnerability allows a local authenticated user to execute arbitrary code.
An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a denial of service (data corruption), cause a data leak, or possibly gain privileges because an AMD IOMMU page-table entry can be half-updated.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Xen: 4.0.0 - 4.14.1
External links
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html
http://www.openwall.com/lists/oss-security/2021/01/19/9
http://xenbits.xen.org/xsa/advisory-347.html
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/
http://security.gentoo.org/glsa/202011-06
http://www.debian.org/security/2020/dsa-4804
http://xenbits.xen.org/xsa/advisory-347.html
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.