PT-2018-25: Improper Authorization in PRTG Network Monitor

(PT-2018-25) Positive Technologies Security Advisory
Improper Authorization in PRTG Network Monitor

Vulnerable software

PRTG Network Monitor
Version: 18.2.39.1661 and earlier

Link:
https://www.paessler.com/prtg

Severity level

Severity level: High
Impact: Improper Authorization
Access Vector: Remote

CVSS v3:
Base Score: 8.8
Vector: (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)

CVE: CVE-2018-19411

Vulnerability description

The specialists of the Positive Research center have detected an Improper Authorization vulnerability in PRTG Network Monitor.

Vulnerability due to improper validation of user rights allows attackers with read-only privileges to create users with read-write privileges including administrators via a specially crafted HTTP request to /api/addusers.

How to fix

Update your software up to the latest version

Advisory status

25.05.2018 - Vendor gets vulnerability details
07.05.2018 - Vendor releases fixed version and details
26.10.2018 - Public disclosure

Credits

The vulnerability was detected by Anton Vaychikauskas, Positive Research Center (Positive Technologies Company)

References

http://en.securitylab.ru/lab/PT-2018-25
https://www.paessler.com/prtg/history/stable#18.2.40.1683

Reports on the vulnerabilities previously discovered by Positive Research:

https://www.ptsecurity.com/
https://en.securitylab.ru/lab/

About Positive Technologies

Positive Technologies is a leading digital security firm with over 15 years of experience in 360° protection of critical IT systems against the most advanced cyberthreats. State-of-the-art solutions are developed at the company's research center—one of the largest in Europe. Positive Technologies experts have helped to identify and fix over 250 zero-day vulnerabilities in products from Cisco, Google, Honeywell, Huawei, Microsoft, Oracle, SAP, Schneider Electric, Siemens, and others, earning a reputation for world-class expertise in protection of devices and infrastructures at all scales from ATMs to nuclear power stations. Findings by Positive Technologies researchers are used for updating the MaxPatrol knowledge base and for development of security solutions including PT Application Firewall, PT Application Inspector, MaxPatrol. These products allow securing web applications, evaluating network protection, blocking attacks in real time, ensuring compliance with industry and national standards, and training security specialists. Positive Technologies is the organizer of the annual Positive Hack Days international forum and security competition.