mirror of
https://github.com/CVEProject/cvelist.git
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77 lines
3.5 KiB
JSON
77 lines
3.5 KiB
JSON
{
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"CVE_data_meta": {
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"ASSIGNER": "cve@mitre.org",
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"ID": "CVE-2020-12887",
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"STATE": "PUBLIC"
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},
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"affects": {
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"vendor": {
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"vendor_data": [
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{
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"product": {
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"product_data": [
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{
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"product_name": "n/a",
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"version": {
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"version_data": [
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{
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"version_value": "n/a"
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}
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]
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}
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}
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]
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},
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"vendor_name": "n/a"
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}
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]
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}
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},
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"data_format": "MITRE",
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"data_type": "CVE",
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"data_version": "4.0",
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"description": {
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"description_data": [
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{
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"lang": "eng",
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"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."
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}
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]
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},
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"problemtype": {
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"problemtype_data": [
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{
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"description": [
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{
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"lang": "eng",
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"value": "n/a"
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}
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]
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}
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]
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},
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"references": {
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"reference_data": [
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{
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"url": "https://github.com/ARMmbed/mbed-os/issues/12957",
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"refsource": "MISC",
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"name": "https://github.com/ARMmbed/mbed-os/issues/12957"
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},
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{
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"url": "https://github.com/ARMmbed/mbed-os/issues/12930",
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"refsource": "MISC",
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"name": "https://github.com/ARMmbed/mbed-os/issues/12930"
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},
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{
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"url": "https://github.com/mjurczak/mbed-coap/commit/4647a68e364401e81dbd370728127d844f221d93",
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"refsource": "MISC",
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"name": "https://github.com/mjurczak/mbed-coap/commit/4647a68e364401e81dbd370728127d844f221d93"
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},
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{
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"refsource": "CONFIRM",
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"name": "https://github.com/ARMmbed/mbed-coap/pull/116",
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"url": "https://github.com/ARMmbed/mbed-coap/pull/116"
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}
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]
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}
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} |