CVE-2021-27393

CVSS V2 Medium 5 CVSS V3 Medium 5.3
Description
A vulnerability has been identified in Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2013.08), Nucleus Source Code (Versions including affected DNS modules). The DNS client does not properly randomize UDP port numbers of DNS requests. That could allow an attacker to poison the DNS cache or spoof DNS resolving.
Overview
  • CVE ID
  • CVE-2021-27393
  • Assigner
  • productcert@siemens.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-04-22T21:15:10
  • Last Modified Date
  • 2022-04-22T19:38:54
Weakness Enumerations
CWE URL
CWE-330 http://cwe.mitre.org/data/definitions/330.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:siemens:nucleus_readystart_v3:*:*:*:*:*:*:*:* 1 OR 2013.08
cpe:2.3:a:siemens:nucleus_source_code:-:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 5
  • Severity
  • MEDIUM
  • Exploitability Score
  • 10
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 5.3
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 3.9
  • Impact Score
  • 1.4
References
Reference URL Reference Tags
https://cert-portal.siemens.com/productcert/pdf/ssa-201384.pdf Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-27393
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27393
History
Created Old Value New Value Data Type Notes
2022-05-10 06:27:17 Added to TrackCVE
2022-12-06 02:25:35 2021-04-22T21:15Z 2021-04-22T21:15:10 CVE Published Date updated
2022-12-06 02:25:35 2022-04-22T19:38:54 CVE Modified Date updated
2022-12-06 02:25:35 Analyzed Vulnerability Status updated