Privilege escalation in Phoenix Contact PC WORX SRT

1) Incorrect default permissions

EUVDB-ID: #VU26518

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-10939

CWE-ID: CWE-276 - Incorrect Default Permissions

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect default path permissions for files and folders that are set by the application. A local user with access to the system can view contents of files and directories or modify them, results in running malicious code as SYSTEM user.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

PC WORX SRT: 1.14

CPE2.3

• cpe:2.3:h:phoenix_contact_gmbh:pc_worx_srt:*:*:*:*:*:*:*:*
• cpe:2.3:h:phoenix_contact_gmbh:pc_worx_srt:1.14:*:*:*:*:*:*:*

External links

https://cert.vde.com/en-us/advisories/vde-2020-012

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.