CVE-2020-24336

moderate-risk
Published 2020-12-11

An issue was discovered in Contiki through 3.0 and Contiki-NG through 4.5. The code for parsing Type A domain name answers in ip64-dns64.c doesn't verify whether the address in the answer's length is sane. Therefore, when copying an address of an arbitrary length, a buffer overflow can occur. This bug can be exploited whenever NAT64 is enabled.

Do I need to act?

~
1.8% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (2)

Contiki

Affected Vendors

Contiki-Os Contiki-Ng

References (4)

Third Party Advisory https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01
Third Party Advisory https://www.kb.cert.org/vuls/id/815128
Third Party Advisory https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01
Third Party Advisory https://www.kb.cert.org/vuls/id/815128
44
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 5/34 · Minimal
Exposure 7/34 · Low