CoreCVE
Back

HIGH

An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products

Published Dec 11, 2020

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 products

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-20

Improper Input Validation

References (2)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Dec 11, 2020
Updated Aug 4, 2024
Reserved Aug 7, 2020
Link CVE-2020-17439
CISA Vulnrichment
Updated n/a
NVD
Status Modified
Modified Jun 17, 2026
Link CVE-2020-17439
Red Hat
Severity n/a
Public date n/a
Links CVE-2020-17439