CVE-2020-6998
The connection establishment algorithm found in Rockwell Automation CompactLogix 5370 and ControlLogix 5570 versions 33 and prior does not sufficiently manage its control flow during execution, creating an infinite loop.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The connection establishment algorithm found in Rockwell Automation CompactLogix 5370 and ControlLogix 5570 versions 33 and prior does not sufficiently manage its control flow during execution, creating an infinite loop. This may allow an attacker to send specially crafted CIP packet requests to a controller, which may cause denial-of-service conditions in communications with other products.
- CVSS 3.1
- 8.6 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- EPSS
- 2.16% probability · 81th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- rockwellautomation/armor compact guardlogix 5370 firmware · rockwellautomation/compact guardlogix 5370 firmware · rockwellautomation/compactlogix 5370 l1 firmware · rockwellautomation/compactlogix 5370 l2 firmware · rockwellautomation/compactlogix 5370 l3 firmware · rockwellautomation/controllogix 5570 firmware · rockwellautomation/guardlogix 5560 firmware · rockwellautomation/guardlogix 5570 firmware · rockwellautomation/guardlogix 5580 firmware
- Source
- ics-cert@hq.dhs.gov
References
- https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1130398Permissions Required, Vendor Advisory
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-061-02Third Party Advisory, US Government Resource
- https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1130398Permissions Required, Vendor Advisory
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-061-02Third Party Advisory, US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.