#VU9452 Resource exhaustion in Xen - CVE-2017-15595

Vulnerability identifier: #VU9452

Vulnerability risk: Low

CVSSv4.0: 1.3 [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/E:U/U:Clear]

CVE-ID: CVE-2017-15595

CWE-ID: CWE-400

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description
The vulnerability allows an adjacent attacker to gain elevated privileges or cause DoS conditions on the target system.

The weakness exists due to improper input validation. An adjacent attacker can supply specially crafted page-table stacking, trigger unbounded recursion, stack consumption, gain elevated privileges or cause hypervisor crash.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 4.5.0 - 4.9.0

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External links
https://xenbits.xen.org/xsa/advisory-240.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.