An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products.
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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 domain names present in the DNS responses have '\0' termination. This results in errors when calculating the offset of the pointer that jumps over domain name bytes in DNS response packets when a name lacks this termination, and eventually leads to dereferencing the pointer at an invalid/arbitrary address, within newdata() and parse_name() in resolv.c.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:uip_project:uip:1.0:*:*:*:*:*:*:* | 1.0 | Vulnerable | Uip Project |
| cpe:2.3:o:contiki-os:contiki:3.0:*:*:*:*:*:*:* | 3.0 | Running on | Contiki-os |
- cpe:2.3:a:uip_project:uip:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·Uip Project
- cpe:2.3:o:contiki-os:contiki:3.0:*:*:*:*:*:*:* Versions 3.0 Running on ·Contiki-os
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-17440
- 2026-10-03 Alias added: GHSA-3jjq-5484-vh7r
References
More Uip Project Uip vulnerabilities
- TI-2020-13204 An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. CVSS 3.1CRITICAL 9.8
- TI-2020-13205 An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. CVSS 3.1HIGH 8.3
- TI-2020-13203 An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. CVSS 3.1HIGH 8.2
- TI-2020-14883 The code that processes DNS responses in uIP through 1.0, as used in Contiki and… CVSS 3.1HIGH 8.2
- TI-2020-10956 An issue was discovered in Contiki through 3.0. CVSS 3.1HIGH 7.5
- TI-2020-14884 An issue was discovered in uIP through 1.0, as used in Contiki and Contiki-NG. CVSS 3.1HIGH 7.5
Sources
- CVE-2020-17440 · CVE Program
- CVE-2020-17440 · NVD
- FIRST EPSS
- GHSA-3jjq-5484-vh7r · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences