CVE-2021-22659
Published Mar 25, 2021
Last updated 4 years ago
Overview
- Description
- Rockwell Automation MicroLogix 1400 Version 21.6 and below may allow a remote unauthenticated attacker to send a specially crafted Modbus packet allowing the attacker to retrieve or modify random values in the register. If successfully exploited, this may lead to a buffer overflow resulting in a denial-of-service condition. The FAULT LED will flash RED and communications may be lost. Recovery from denial-of-service condition requires the fault to be cleared by the user.
- Source
- ics-cert@hq.dhs.gov
- NVD status
- Analyzed
Social media
- Hype score
- Not currently trending
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 8.6
- Impact score
- 4.7
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
- Severity
- HIGH
CVSS 2.0
- Type
- Primary
- Base score
- 7.5
- Impact score
- 6.4
- Exploitability score
- 10
- Vector string
- AV:N/AC:L/Au:N/C:P/I:P/A:P
Weaknesses
- ics-cert@hq.dhs.gov
- CWE-120
Configurations
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{
"nodes": [
{
"negate": false,
"cpeMatch": [
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"criteria": "cpe:2.3:o:rockwellautomation:micrologix_1400_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "325F851D-26F6-4361-95A8-1CB68746B5E3",
"versionEndIncluding": "21.6"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
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"criteria": "cpe:2.3:h:rockwellautomation:micrologix_1400:-:*:*:*:*:*:*:*",
"vulnerable": false,
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}
],
"operator": "OR"
}
],
"operator": "AND"
}
]