CVE-2018-19417
CVSS v3
10
CRITICAL
EPSS Score
6.2 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
An issue was discovered in the MQTT server in Contiki-NG before 4.2. The function parse_publish_vhdr() that parses MQTT PUBLISH messages with a variable length header uses memcpy to input data into a fixed size buffer. The allocated buffer can fit only MQTT_MAX_TOPIC_LENGTH (default 64) bytes, and a length check is missing. This could lead to Remote Code Execution via a stack-smashing attack (overwriting the function return address). Contiki-NG does not separate the MQTT server from other servers and the OS modules, so access to all memory regions is possible.
Technical details
- Published
- 2018-11-21
Frequently asked questions
What is CVE-2018-19417?
An issue was discovered in the MQTT server in Contiki-NG before 4.2. The function parse_publish_vhdr() that parses MQTT PUBLISH messages with a variable length header uses memcpy to input data into a fixed size buffer. The allocated buffer can fit only MQTT_MAX_TOPIC_LENGTH (default 64) bytes, and a length check is missing. This could lead to Remote Code Execution via a stack-smashing attack (overwriting the function return address). Contiki-NG does not separate the MQTT server from other servers and the OS modules, so access to all memory regions is possible.
Is CVE-2018-19417 actively exploited?
Active exploitation of CVE-2018-19417 has not been confirmed. The EPSS score is 6.2%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2018-19417?
CVE-2018-19417 has a CVSS v3 base score of 10 (CRITICAL severity).
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