#VU17903 Resource management error in Xen - CVE-2019-17344

Vulnerability identifier: #VU17903

Vulnerability risk: Low

CVSSv4.0: 5.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:Clear]

CVE-ID: CVE-2019-17344

CWE-ID: CWE-399

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to resource management error related to missing preemption in x86 PV page table unvalidation. A local user of guest operating system can use a specially crafted kernel to perform denial of service attack against the host system.

Mitigation

Vulnerable software versions

Xen: 4.7.0 - 4.11.1

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External links
https://xenbits.xen.org/xsa/advisory-290.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.