Multiple vulnerabilities in Xen

Published: 2017-11-29 | Updated: 2017-11-29

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2017-17045 CVE-2017-17044
CWE-ID	CWE-264 CWE-835
Exploitation vector	Local network
Public exploit	N/A
Vulnerable software Subscribe	Xen Server applications / Virtualization software
Vendor	Xen Project

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Privilege escalation

EUVDB-ID: #VU9435

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-17045

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows an adjacent attacker to gain elevated privileges on the target system.

The weakness exists due to improper privileges control. An adjacent attacker can trigger a p2m error checking flaw in the Populate on Demand (PoD) code and gain write access to freed memory and gain elevated privileges on the host system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Xen: 4.5.0 - 4.9.0

External links

http://xenbits.xen.org/xsa/advisory-247.html

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.

2) Infinite loop

EUVDB-ID: #VU9442