SB2018112111 - Security restrictions bypass in Schneider Electric Modicon M221
Published: November 21, 2018
Security Bulletin ID
SB2018112111
CSH Severity
Low
Patch available
NO
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Insufficient verification of data authenticity (CVE-ID: CVE-2018-7798)
CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to bypass security restrictions on the target system.
The vulnerability exists due to improper implementation of the network configuration module in UMAS protocol. A remote attacker can modify configuration parameters and intercept a target PLC’s network traffic.
Remediation
Cybersecurity Help is not aware of any official remediation provided by the vendor.