PT-2020-15687 · Contiki · Contiki-Ng+1

Published 2020-12-11 · Updated 2020-12-15 · CVE-2020-24336

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Contiki versions through 3.0 Contiki-NG versions through 4.5

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

Recommendations For Contiki versions through 3.0, update to a version that fixes the issue with address length verification in ip64-dns64.c. For Contiki-NG versions through 4.5, update to a version that fixes the issue with address length verification in ip64-dns64.c. As a temporary workaround, consider disabling NAT64 until a patch is available.

Fix

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2020-24336

Affected Products

Contiki

Contiki-Ng

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2020-24336 · Security Note
• https://osv.dev/vulnerability/CVE-2020-24336 · Vendor Advisory
• https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 · Note
• https://t.me/cibsecurity/20712 · Telegram Post
• https://t.me/cibsecurity/20653 · Telegram Post
• https://t.me/cibsecurity/20693 · Telegram Post
• https://t.me/cibsecurity/20673 · Telegram Post
• https://kb.cert.org/vuls/id/815128 · Note
• https://t.me/cvenotify/7062 · Telegram Post