#VU17904 Permissions, Privileges, and Access Controls in Xen - CVE-2019-17343

Vulnerability identifier: #VU17904

Vulnerability risk: Low

CVSSv4.0: 7.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear]

CVE-ID: CVE-2019-17343

CWE-ID: CWE-264

Exploitation vector: Local

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 insecure processing of PV domains and related configuration.  An untrusted PV domain with access to a physical device can DMA into its own pagetables, leading to privilege escalation.

Mitigation

Vulnerable software versions

Xen: 4.7.0 - 4.11.1

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External links
https://xenbits.xen.org/xsa/advisory-288.html

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Q & A

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.