Vulnerability Description
An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. When the Urgent flag is set in a TCP packet, and the stack is configured to ignore the urgent data, the stack attempts to use the value of the Urgent pointer bytes to separate the Urgent data from the normal data, by calculating the offset at which the normal data should be present in the global buffer. However, the length of this offset is not checked; therefore, for large values of the Urgent pointer bytes, the data pointer can point to memory that is way beyond the data buffer in uip_process in uip.c.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Uip Project | Uip | <= 1.0 |
| Contiki-Os | Contiki | <= 3.0 |
| Open-Iscsi Project | Open-Iscsi | <= 2.1.7 |
| Siemens | Sentron 3Va Com100 Firmware | < 4.4.1 |
| Siemens | Sentron 3Va Com100 | - |
| Siemens | Sentron 3Va Com800 Firmware | < 4.4.1 |
| Siemens | Sentron 3Va Com800 | - |
| Siemens | Sentron 3Va Dsp800 Firmware | < 4.0 |
| Siemens | Sentron 3Va Dsp800 | - |
| Siemens | Sentron Pac2200 Clp Firmware | - |
| Siemens | Sentron Pac2200 Clp | - |
| Siemens | Sentron Pac2200 Firmware | < 3.2.2 |
| Siemens | Sentron Pac2200 | - |
| Siemens | Sentron Pac3200 Firmware | < 2.4.7 |
| Siemens | Sentron Pac3200 | - |
| Siemens | Sentron Pac3200T Firmware | < 3.2.2 |
| Siemens | Sentron Pac3200T | - |
| Siemens | Sentron Pac3220 Firmware | < 3.2.0 |
| Siemens | Sentron Pac3220 | - |
| Siemens | Sentron Pac4200 Firmware | < 2.3.0 |
Related Weaknesses (CWE)
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-541018.pdfPatchThird Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01Third Party AdvisoryUS Government Resource
- https://www.kb.cert.org/vuls/id/815128Third Party AdvisoryUS Government Resource
- https://cert-portal.siemens.com/productcert/pdf/ssa-541018.pdfPatchThird Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01Third Party AdvisoryUS Government Resource
- https://www.kb.cert.org/vuls/id/815128Third Party AdvisoryUS Government Resource
FAQ
What is CVE-2020-17437?
CVE-2020-17437 is a vulnerability with a CVSS score of 8.2 (HIGH). An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. When the Urgent flag is set in a TCP packet, and the stack is configured to ignore the urgent data, the stack attempts to...
How severe is CVE-2020-17437?
CVE-2020-17437 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-17437?
Check the references section above for vendor advisories and patch information. Affected products include: Uip Project Uip, Contiki-Os Contiki, Open-Iscsi Project Open-Iscsi, Siemens Sentron 3Va Com100 Firmware, Siemens Sentron 3Va Com100.