SB2021030309 - Denial of service in Rockwell Automation CompactLogix 5370 and ControlLogix 5570 Controllers
Published: March 3, 2021
Security Bulletin ID
SB2021030309
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Infinite loop (CVE-ID: CVE-2020-6998)
CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the connection establishment algorithm does not sufficiently manage its control flow during execution. A remote attacker can send a specially crafted CIP packet and cause denial of service conditions.
Remediation
Install update from vendor's website.