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.
References
Link Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-541018.pdf Patch Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 Third Party Advisory US Government Resource
https://www.kb.cert.org/vuls/id/815128 Third Party Advisory US Government Resource
History

No history.

cve-icon MITRE Information

Status: PUBLISHED

Assigner: mitre

Published: 2020-12-11T22:24:38

Updated: 2021-03-09T14:06:21

Reserved: 2020-08-07T00:00:00


Link: CVE-2020-17437

JSON object: View

cve-icon NVD Information

Status : Analyzed

Published: 2020-12-11T23:15:12.683

Modified: 2022-08-08T14:57:57.177


Link: CVE-2020-17437

JSON object: View

cve-icon Redhat Information

No data.

CWE