| ID |
CVE-2020-12884
|
| Sažetak |
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_multiple_options() parses CoAP options that may occur multiple consecutive times in a single packet. While processing the options, packet_data_pptr is accessed after being incremented by option_len without a prior out-of-bounds memory check. The temp_parsed_uri_query_ptr is validated for a correct range, but the range valid for temp_parsed_uri_query_ptr is derived from the amount of allocated heap memory, not the actual input size. Therefore the check of temp_parsed_uri_query_ptr may be insufficient for safe access to the area pointed to by packet_data_pptr. As a result, access to a memory area outside of the intended boundary of the packet buffer is made. |
| Reference |
|
| CVSS |
| Base: | 6.4 |
| Impact: | 4.9 |
| Exploitability: | 10.0 |
|
| Pristup |
| Vektor | Složenost | Autentikacija |
| NETWORK |
LOW |
NONE |
|
| Impact |
| Povjerljivost | Cjelovitost | Dostupnost |
| PARTIAL |
NONE |
PARTIAL |
|
| CVSS vektor |
AV:N/AC:L/Au:N/C:P/I:N/A:P |
| Zadnje važnije ažuriranje |
25-06-2020 - 14:41 |
| Objavljeno |
18-06-2020 - 19:15 |
