CVE-2020-13987
HIGHCVSS 7.5/10EPSS 3.19%
Last modified
CVE-2020-13987 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in Contiki through 3.0. An Out-of-Bounds Read vulnerability exists in the uIP TCP/IP Stack component when calculating the checksums for IP packets in upper_layer_chksum in net/ipv4/uip.c.. EPSS estimates a 3.19% chance of exploitation in the next 30 days.
Description
An issue was discovered in Contiki through 3.0. An Out-of-Bounds Read vulnerability exists in the uIP TCP/IP Stack component when calculating the checksums for IP packets in upper_layer_chksum in net/ipv4/uip.c.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Uip Project | Uip | <= 1.0 |
| Open-Iscsi Project | Open-Iscsi | <= 2.1.12 |
| Siemens | Sentron 3va Com100 Firmware | < 4.4.1 |
| Siemens | Sentron 3va Com800 Firmware | < 4.4.1 |
| Siemens | Sentron Pac3200 Firmware | < 2.4.7 |
| Siemens | Sentron Pac4200 Firmware | < 2.3.0 |
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-541018.pdfPatch, Third Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01Third Party Advisory, US Government Resource
- https://www.kb.cert.org/vuls/id/815128Third Party Advisory, US Government Resource
- https://cert-portal.siemens.com/productcert/pdf/ssa-541018.pdfPatch, Third Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01Third Party Advisory, US Government Resource
- https://www.kb.cert.org/vuls/id/815128Third Party Advisory, US Government Resource
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-13987?
An issue was discovered in Contiki through 3.0. An Out-of-Bounds Read vulnerability exists in the uIP TCP/IP Stack component when calculating the checksums for IP packets in upper_layer_chksum in net/ipv4/uip.c.
How severe is CVE-2020-13987?
CVE-2020-13987 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.19% probability of exploitation in the next 30 days.
How do I fix CVE-2020-13987?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2020-13987?
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Scan your code nowSource: NVD / NIST