Denial of service in Schneider Electric Magelis HMI Panels

Published: 2020-02-14

Risk	Medium
Patch available	NO
Number of vulnerabilities	1
CVE-ID	CVE-2019-6833
CWE-ID	CWE-754
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Magelis HMIGTO Hardware solutions / Other hardware appliances Magelis HMISTO Hardware solutions / Other hardware appliances Magelis XBTGH Hardware solutions / Other hardware appliances Magelis HMIGTU Hardware solutions / Other hardware appliances Magelis HMIGTUX Hardware solutions / Other hardware appliances Magelis HMISCU Hardware solutions / Other hardware appliances Magelis HMISTU Hardware solutions / Other hardware appliances Magelis XBTGT Hardware solutions / Other hardware appliances Magelis XBTGC Hardware solutions / Other hardware appliances Magelis HMIGXO Hardware solutions / Other hardware appliances Magelis HMIGXU Hardware solutions / Other hardware appliances
Vendor	Schneider Electric

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper Check for Unusual or Exceptional Conditions

EUVDB-ID: #VU25342

Risk: Medium

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

CVE-ID: CVE-2019-6833

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the HMI may temporarily freeze when the device receives a high rate of frames. When the attack stops, the buffered commands are processed by the HMI. A remote attacker can cause a denial of service condition on the target system.

Mitigation

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

Vulnerable software versions

Magelis HMIGTO: All versions

Magelis HMISTO: All versions

Magelis XBTGH: All versions

Magelis HMIGTU: All versions

Magelis HMIGTUX: All versions

Magelis HMISCU: All versions

Magelis HMISTU: All versions

Magelis XBTGT: All versions

Magelis XBTGC: All versions

Magelis HMIGXO: All versions

Magelis HMIGXU: All versions

External links

http://security.cse.iitk.ac.in/responsible-disclosure
http://www.schneider-electric.com/ww/en/download/document/SEVD-2019-225-01

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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