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CVE-2024-32017
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Description
RIOT is a real-time multi-threading operating system that supports a range of devices that are typically 8-bit, 16-bit and 32-bit microcontrollers. The size check in the gcoap_dns_server_proxy_get() function contains a small typo that may lead to a buffer overflow in the subsequent strcpy(). In detail, the length of the _uri string is checked instead of the length of the _proxy string. The _gcoap_forward_proxy_copy_options() function does not implement an explicit size check before copying data to the cep->req_etag buffer that is COAP_ETAG_LENGTH_MAX bytes long. If an attacker can craft input so that optlen becomes larger than COAP_ETAG_LENGTH_MAX, they can cause a buffer overflow. If the input above is attacker-controlled and crosses a security boundary, the impact of the buffer overflow vulnerabilities could range from denial of service to arbitrary code execution. This issue has yet to be patched. Users are advised to add manual bounds checking.
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