CVE-2020-17439

CVSS V2 High 7.5 CVSS V3 High 8.3
Description
An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. The code that parses incoming DNS packets does not validate that the incoming DNS replies match outgoing DNS queries in newdata() in resolv.c. Also, arbitrary DNS replies are parsed if there was any outgoing DNS query with a transaction ID that matches the transaction ID of an incoming reply. Provided that the default DNS cache is quite small (only four records) and that the transaction ID has a very limited set of values that is quite easy to guess, this can lead to DNS cache poisoning.
Overview
  • CVE ID
  • CVE-2020-17439
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-12-11T23:15:12
  • Last Modified Date
  • 2020-12-15T15:36:04
Weakness Enumerations
CWE URL
CWE-20 http://cwe.mitre.org/data/definitions/20.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:a:uip_project:uip:1.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:contiki-os:contiki:3.0:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:P/I:P/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 7.5
  • Severity
  • HIGH
  • Exploitability Score
  • 10
  • Impact Score
  • 6.4
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • CHANGED
  • Confidentiality Impact
  • LOW
  • Availability Impact
  • LOW
  • Base Score
  • 8.3
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 3.7
References
Reference URL Reference Tags
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 Third Party Advisory US Government Resource
https://www.kb.cert.org/vuls/id/815128 Third Party Advisory US Government Resource
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2020-17439
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-17439
History
Created Old Value New Value Data Type Notes
2022-05-10 07:30:20 Added to TrackCVE
2022-12-05 18:06:20 2020-12-11T23:15Z 2020-12-11T23:15:12 CVE Published Date updated
2022-12-05 18:06:20 2020-12-15T15:36:04 CVE Modified Date updated
2022-12-05 18:06:20 Analyzed Vulnerability Status updated