{"containers":{"cna":{"affected":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2020-06-18T18:24:47.000Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","shortName":"mitre"},"references":[{"tags":["x_refsource_MISC"],"url":"https://github.com/ARMmbed/mbed-os/issues/12957"},{"tags":["x_refsource_MISC"],"url":"https://github.com/ARMmbed/mbed-os/issues/12930"},{"tags":["x_refsource_MISC"],"url":"https://github.com/mjurczak/mbed-coap/commit/4647a68e364401e81dbd370728127d844f221d93"},{"tags":["x_refsource_CONFIRM"],"url":"https://github.com/ARMmbed/mbed-coap/pull/116"}],"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2020-12887","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"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."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"https://github.com/ARMmbed/mbed-os/issues/12957","refsource":"MISC","url":"https://github.com/ARMmbed/mbed-os/issues/12957"},{"name":"https://github.com/ARMmbed/mbed-os/issues/12930","refsource":"MISC","url":"https://github.com/ARMmbed/mbed-os/issues/12930"},{"name":"https://github.com/mjurczak/mbed-coap/commit/4647a68e364401e81dbd370728127d844f221d93","refsource":"MISC","url":"https://github.com/mjurczak/mbed-coap/commit/4647a68e364401e81dbd370728127d844f221d93"},{"name":"https://github.com/ARMmbed/mbed-coap/pull/116","refsource":"CONFIRM","url":"https://github.com/ARMmbed/mbed-coap/pull/116"}]}}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T12:11:18.832Z"},"title":"CVE Program Container","references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://github.com/ARMmbed/mbed-os/issues/12957"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://github.com/ARMmbed/mbed-os/issues/12930"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://github.com/mjurczak/mbed-coap/commit/4647a68e364401e81dbd370728127d844f221d93"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"https://github.com/ARMmbed/mbed-coap/pull/116"}]}]},"cveMetadata":{"assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","assignerShortName":"mitre","cveId":"CVE-2020-12887","datePublished":"2020-06-18T18:24:47.000Z","dateReserved":"2020-05-15T00:00:00.000Z","dateUpdated":"2024-08-04T12:11:18.832Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"}