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
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. The code that reassembles fragmented packets fails to properly validate the total length of an incoming packet specified in its IP header, as well as the fragmentation offset value specified in the IP header. By crafting a packet with specific values of the IP header length and the fragmentation offset, attackers can write into the .bss section of the program (past the statically allocated buffer that is used for storing the fragmented data) and cause a denial of service in uip_reass() in uip.c, or possibly execute arbitrary code on some target architectures.
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-2020-17438
- 2026-10-03 Alias added: GHSA-wp96-g7r8-wxf4
References
More Uip Project Uip vulnerabilities
- 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
- 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-2020-17438 · CVE Program
- CVE-2020-17438 · NVD
- FIRST EPSS
- GHSA-wp96-g7r8-wxf4 · GitHub Advisory Database · CC BY 4.0
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