SB2019071509 - Buffer overflow in Schneider Electric Modicon Controllers
Published: July 15, 2019 Updated: October 3, 2019
Security Bulletin ID
SB2019071509
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Buffer overflow (CVE-ID: CVE-2018-7838)
The vulnerability allows a remote attacker to cause a denial of service (DoS) on the target system.
The vulnerability exists due to a boundary error on the FTP service of the controller or the Ethernet BMENOC module when it receives a FTP CWD command with a data length greater than 1020 bytes. A power cycle is then needed to reactivate the FTP service. A remote attacker can trigger memory corruption and cause a denial of service.
Remediation
Install update from vendor's website.