Privilege escalation in HP Display Assistant and My Display

1) Incorrect default permissions

EUVDB-ID: #VU6386

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-3210

CWE-ID: CWE-276 - Incorrect Default Permissions

Exploit availability: No

Description

The vulnerability allows a local user to elevate his privileges.

The vulnerability exists due to Portrait Displays SDK is installed with world-writable permissions and runs the component pdiservice.exe under context of NT AUTHORITY/SYSTEM. A local user can overwrite the affected file and execute arbitrary code on the system with elevated privileges.

Successful exploitation of the vulnerability maty allow a local user to escalate privileges and compromise affected system.

Mitigation

Update to HP Display Assistant 2.11 or HP My Display 2.1.

Vulnerable software versions

HP My Display: 2.0

HP Display Assistant: 2.1

External links

http://www.sec-consult.com/en/Vulnerability-Lab/Advisories.htm#a220
http://blog.sec-consult.com/2017/04/what-unites-hp-philips-and-fujitsu-one.html
http://www.portrait.com/securityupdate.html
http://www.kb.cert.org/vuls/id/219739

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.