CVE-2021-33541

CVSS V2 High 7.8 CVSS V3 High 7.5
Description
Phoenix Contact Classic Line Controllers ILC1x0 and ILC1x1 in all versions/variants are affected by a Denial-of-Service vulnerability. The communication protocols and device access do not feature authentication measures. Remote attackers can use specially crafted IP packets to cause a denial of service on the PLC's network communication module. A successful attack stops all network communication. To restore the network connectivity the device needs to be restarted. The automation task is not affected.
Overview
  • CVE ID
  • CVE-2021-33541
  • Assigner
  • info@cert.vde.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-06-25T19:15:09
  • Last Modified Date
  • 2021-07-02T00:11:39
Weakness Enumerations
CWE URL
CWE-770 http://cwe.mitre.org/data/definitions/770.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:phoenixcontact:ilc1x0_firmware:*:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:phoenixcontact:ilc1x0:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:phoenixcontact:ilc1x1_firmware:*:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:phoenixcontact:ilc1x1:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:N/A:C
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 7.8
  • Severity
  • HIGH
  • Exploitability Score
  • 10
  • Impact Score
  • 6.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 7.5
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://cert.vde.com/en-us/advisories/vde-2021-019 Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-33541
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33541
History
Created Old Value New Value Data Type Notes
2022-05-10 07:09:06 Added to TrackCVE
2022-12-05 05:03:38 2021-06-25T19:15Z 2021-06-25T19:15:09 CVE Published Date updated
2022-12-05 05:03:38 2021-07-02T00:11:39 CVE Modified Date updated
2022-12-05 05:03:38 Analyzed Vulnerability Status updated