CVE-2020-17439

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.

CVSS v3.0 8.3 HIGH
CVSS v2.0 7.5 HIGH

8.3^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope CHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
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

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Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:uip_project:uip:1.0:*:*:*:*:*:*:*

cpe:2.3:o:contiki-os:contiki:3.0:*:*:*:*:*:*:*

Information

Published : 2020-12-11 15:15

Updated : 2020-12-15 07:36

NVD link : CVE-2020-17439

Mitre link : CVE-2020-17439

JSON object : View

CWE

CWE-20

Improper Input Validation

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Products Affected

uip_project

uip

contiki-os

contiki

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