Multiple vulnerabilities in PRTG Network Monitor

Published: 2018-09-24

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-19203 CVE-2018-19204
CWE-ID	CWE-20 CWE-78
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	PRTG Network Monitor Server applications / Remote management servers, RDP, SSH
Vendor	Paessler AG

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper input validation

EUVDB-ID: #VU16206

Risk: Low

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-19203

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition.

The vulnerability exists due to an error when processing malicious input. A remote attacker can send a specially crafted HTTP request and terminate the PRTG Core Server Service resulting in denial of service.

Mitigation

Update to version 18.2.41.1652.

Vulnerable software versions

PRTG Network Monitor: 18.1.36.3728 - 18.2.40.1683

CPE2.3

External links

https://www.ptsecurity.com/ww-en/analytics/threatscape/pt-2018-22/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) OS command injection

EUVDB-ID: #VU16207

Risk: High

CVSSv4.0: 2.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:U/U:Amber]

CVE-ID: CVE-2018-19204

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a remote high-privileged attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to the user's input in the POST parameter 'proxyport_' is mishandled when creating an HTTP Advanced Sensor. A remote attacker can craft an HTTP request and override the 'writeresult' command-line parameter for HttpAdvancedSensor.exe and store arbitrary data in an arbitrary place on the file system to create an executable file in the Custom SensorsEXE directory and execute it by creating EXE/Script Sensor.