CVE-2020-24336
CriticalThe 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.
Published Dec 11, 2020 · Updated Nov 21, 2024
Key Facts
Patch immediately- CVE-2020-24336 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Contiki-Ng, Contiki (Contiki-OS).
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 59% probability of exploitation in the next 30 days.
- Fixed versions are available, including Contiki-Ng <=4.5, Contiki <=3.0, Contiki-Ng 4.5.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
59%
Higher than 99.1% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
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Description
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.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Contiki-NgContiki-Ng | See advisory | 4.5 |
| ContikiContiki-OS | See advisory | 3.0 |
Patched Releases
Contiki-Ng
<=4.5
Contiki
<=3.0
Timeline
Publicly disclosed
Dec 11, 2020
Last updated
Nov 21, 2024
Weakness Type
- CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
References
FAQ
Common Questions.
An issue was discovered in Contiki through 3.0 and Contiki-NG through 4.5.
Affected: Contiki-Ng; Contiki (Contiki-OS). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Contiki-Ng <=4.5, Contiki <=3.0, Contiki-Ng 4.5.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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