← Back

CVE-2020-17439

nvd nist
Published: Dec 11, 2020Modified: Jun 17, 2026

JSON object

Loading...
8.3
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
Exploitability: 3.9 / Impact: 3.7
Source: NVD

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.

Affected (1)

Products: Uip Project: Uip
Uip Project
1 product
Uip
Configuration A
1 vulnerable · 1 platform
Vulnerable SoftwareAffected Versions
Uip
Version 1.0
Running on/withPlatform Versions
Contiki Os
Contiki
Version 3.0

Related CWEs

CWE-20
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

References (4)

Source: cve@mitre.org
Third Party AdvisoryUS Government Resource
Source: cve@mitre.org
Third Party AdvisoryUS Government Resource
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party AdvisoryUS Government Resource
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party AdvisoryUS Government Resource

Timeline

No history available yet.