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3 vulnerabilities found for mbed-coap by arm
VAR-202006-0090
Vulnerability from variot - Updated: 2024-11-23 22:41Memory leaks were discovered in the CoAP library in Arm Mbed OS 5.15.3 when using the Arm mbed-coap library 5.1.5. The CoAP parser is responsible for parsing received CoAP packets. The function sn_coap_parser_options_parse() parses the CoAP option number field of all options present in the input packet. Each option number is calculated as a sum of the previous option number and a delta of the current option. The delta and the previous option number are expressed as unsigned 16-bit integers. Due to lack of overflow detection, it is possible to craft a packet that wraps the option number around and results in the same option number being processed again in a single packet. Certain options allocate memory by calling a memory allocation function. In the cases of COAP_OPTION_URI_QUERY, COAP_OPTION_URI_PATH, COAP_OPTION_LOCATION_QUERY, and COAP_OPTION_ETAG, there is no check on whether memory has already been allocated, which in conjunction with the option number integer overflow may lead to multiple assignments of allocated memory to a single pointer. This has been demonstrated to lead to memory leak by buffer orphaning. As a result, the memory is never freed. Arm mbed-coap The library contains a vulnerability regarding the lack of free memory after expiration.Service operation interruption (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 this vulnerability to cause a denial of service (memory leak)
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CVE-2020-12887 (GCVE-0-2020-12887)
Vulnerability from nvd – Published: 2020-06-18 18:24 – Updated: 2024-08-04 12:11
VLAI
EPSS
VEX
Summary
Memory leaks were discovered in the CoAP library in Arm Mbed OS 5.15.3 when using the Arm mbed-coap library 5.1.5. The CoAP parser is responsible for parsing received CoAP packets. The function sn_coap_parser_options_parse() parses the CoAP option number field of all options present in the input packet. Each option number is calculated as a sum of the previous option number and a delta of the current option. The delta and the previous option number are expressed as unsigned 16-bit integers. Due to lack of overflow detection, it is possible to craft a packet that wraps the option number around and results in the same option number being processed again in a single packet. Certain options allocate memory by calling a memory allocation function. In the cases of COAP_OPTION_URI_QUERY, COAP_OPTION_URI_PATH, COAP_OPTION_LOCATION_QUERY, and COAP_OPTION_ETAG, there is no check on whether memory has already been allocated, which in conjunction with the option number integer overflow may lead to multiple assignments of allocated memory to a single pointer. This has been demonstrated to lead to memory leak by buffer orphaning. As a result, the memory is never freed.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ARMmbed/mbed-os/issues/12957 | x_refsource_MISC |
| https://github.com/ARMmbed/mbed-os/issues/12930 | x_refsource_MISC |
| https://github.com/mjurczak/mbed-coap/commit/4647… | x_refsource_MISC |
| https://github.com/ARMmbed/mbed-coap/pull/116 | x_refsource_CONFIRM |
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CVE-2020-12887 (GCVE-0-2020-12887)
Vulnerability from cvelistv5 – Published: 2020-06-18 18:24 – Updated: 2024-08-04 12:11
VLAI
EPSS
VEX
Summary
Memory leaks were discovered in the CoAP library in Arm Mbed OS 5.15.3 when using the Arm mbed-coap library 5.1.5. The CoAP parser is responsible for parsing received CoAP packets. The function sn_coap_parser_options_parse() parses the CoAP option number field of all options present in the input packet. Each option number is calculated as a sum of the previous option number and a delta of the current option. The delta and the previous option number are expressed as unsigned 16-bit integers. Due to lack of overflow detection, it is possible to craft a packet that wraps the option number around and results in the same option number being processed again in a single packet. Certain options allocate memory by calling a memory allocation function. In the cases of COAP_OPTION_URI_QUERY, COAP_OPTION_URI_PATH, COAP_OPTION_LOCATION_QUERY, and COAP_OPTION_ETAG, there is no check on whether memory has already been allocated, which in conjunction with the option number integer overflow may lead to multiple assignments of allocated memory to a single pointer. This has been demonstrated to lead to memory leak by buffer orphaning. As a result, the memory is never freed.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ARMmbed/mbed-os/issues/12957 | x_refsource_MISC |
| https://github.com/ARMmbed/mbed-os/issues/12930 | x_refsource_MISC |
| https://github.com/mjurczak/mbed-coap/commit/4647… | x_refsource_MISC |
| https://github.com/ARMmbed/mbed-coap/pull/116 | x_refsource_CONFIRM |
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