VAR-202006-0089

Vulnerability from variot - Updated: 2023-12-18 12:56

A buffer over-read was discovered in the CoAP library in Arm Mbed OS 5.15.3. The CoAP parser is responsible for parsing received CoAP packets. The function sn_coap_parser_options_parse() parses the CoAP packet header starting from the message token. The length of the token in the received message is provided in the first byte parsed by the sn_coap_parser_options_parse() function. The length encoded in the message is not validated against the actual input buffer length before accessing the token. As a result, memory access outside of the intended boundary of the buffer may occur. Arm Mbed OS Exists in an out-of-bounds read vulnerability.Information is obtained and service operation is interrupted (DoS) It may be put into a state. ARM Mbed OS is a set of open source embedded operating system dedicated to the Internet of Things of the British ARM company. CoAP library is one of the Constrained Application Protocol (CoAP) libraries. An attacker can use the malformed CoAP packet to exploit the vulnerability to obtain sensitive information or cause denial of service

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