SB2019052220 - Buffer overflow in Schneider Electric Modicon Controllers
Published: May 22, 2019 Updated: October 3, 2019
Security Bulletin ID
SB2019052220
CSH 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 vulnerability.
1) Buffer overflow (CVE-ID: CVE-2018-7851)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service (DoS) condition on the target system.
The vulnerability exists due to a boundary error when sending a specially crafted Modbus packet. A remote authenticated attacker can trigger memory corruption and cause a denial of service condition to the device that would force a restart to restore availability.
Remediation
Install update from vendor's website.