CVE-2018-7831 — HIGH (8.8) — White Hats Nepal

Vulnerability Description

An Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 allowing an attacker to send a specially crafted URL to a currently authenticated web server user to execute a password change on the web server.

CVSS Score

8.8

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Schneider-Electric	Modicom M340 Firmware	All versions
Schneider-Electric	Modicom M340	-
Schneider-Electric	Modicom Premium Firmware	All versions
Schneider-Electric	Modicom Premium	-
Schneider-Electric	Modicom Quantum Firmware	All versions
Schneider-Electric	Modicom Quantum	-
Schneider-Electric	Modicom Bmxnor0200H Firmware	All versions
Schneider-Electric	Modicom Bmxnor0200H	-

Related Weaknesses (CWE)

CWE-79 CWE-352

References

https://www.schneider-electric.com/en/download/document/SEVD-2018-327-01/Vendor Advisory
https://www.tenable.com/security/research/tra-2018-38ExploitThird Party Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2018-327-01/Vendor Advisory
https://www.tenable.com/security/research/tra-2018-38ExploitThird Party Advisory

FAQ

What is CVE-2018-7831?

CVE-2018-7831 is a vulnerability with a CVSS score of 8.8 (HIGH). An Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 allowing an ...

How severe is CVE-2018-7831?

CVE-2018-7831 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2018-7831?

Check the references section above for vendor advisories and patch information. Affected products include: Schneider-Electric Modicom M340 Firmware, Schneider-Electric Modicom M340, Schneider-Electric Modicom Premium Firmware, Schneider-Electric Modicom Premium, Schneider-Electric Modicom Quantum Firmware.