CVE-2020-17437

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 v3.0 8.2 HIGH
CVSS v2.0 6.4 MEDIUM

8.2^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

6.4^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:P/I:N/A:P

Exploitability : 10.0 / Impact : 4.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
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
https://cert-portal.siemens.com/productcert/pdf/ssa-541018.pdf

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:uip_project:uip:1.0:*:*:*:*:*:*:*

cpe:2.3:o:contiki-os:contiki:3.0:*:*:*:*:*:*:*

Information

Published : 2020-12-11 23:15

Updated : 2021-03-09 15:15

NVD link : CVE-2020-17437

Mitre link : CVE-2020-17437

JSON object : View

Products Affected

uip_project

uip

contiki-os

contiki

CWE

CWE-787

Out-of-bounds Write

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