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
- Low · Low · Low
- 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 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.
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-2020-17439
- 2026-10-03 Alias added: GHSA-5xvj-fmm7-pv9c
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-2020-13203 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
- TI-2020-13206 An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. CVSS 3.1HIGH 7.5
Sources
- CVE-2020-17439 · CVE Program
- CVE-2020-17439 · NVD
- FIRST EPSS
- GHSA-5xvj-fmm7-pv9c · GitHub Advisory Database · CC BY 4.0
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