HIGH
CVE-2020-13987
CWE-125Published: December 11, 2020· Updated: Jun 17, 2026
7.5
CVSS v3.1
Official 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.
Technical Analysis
CVE-2020-13987 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
contiki-os1 product(s)
contiki
open-iscsi_project1 product(s)
open-iscsi
siemens8 product(s)
sentron 3va com100 firmwaresentron 3va com100sentron 3va com800 firmwaresentron 3va com800sentron pac3200 firmwaresentron pac3200sentron pac4200 firmwaresentron pac4200
uip_project1 product(s)
uip
Source: NVD CPE · 11 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (6)
→
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
Quick Facts
CVE IDCVE-2020-13987
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-125
CISA KEVNo
Affected4 vendor(s)
PublishedDec 11, 2020
Related CVEs (CWE-125)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-13987 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.