Privilege escalation in Xen



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2016-7092
CWE-ID CWE-284
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 Xen
Server applications / Virtualization software

Vendor Xen Project

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Privilege escalation

EUVDB-ID: #VU388

Risk: Low

CVSSv4.0: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear]

CVE-ID: CVE-2016-7092

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows local administrative user to get elevated privileges on the host system.

The vulnerability exists due to entrying of L3 code in 64-bit hypervisor by administrative user of 32-bit PV that allows him to gain privileges on the target system.

Successful exploitation of this vulnerability will result in gaining elevated privileges by the guest attacker.

Mitigation

Install patched version from vendor's website: xsa185.patch



Vulnerable software versions

Xen: 4.1.6 - 4.7.0

CPE2.3 External links

https://xenbits.xen.org/xsa/advisory-185.html


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. However, a fully functional exploit for this vulnerability is available.



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