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0 A memory disclosure vulnerability exists in libcoap's OSCORE configuration parser in libcoap before release-4.3.5-patches. An out-of-bounds read may occur when parsing certain configuration values, allowing an attacker to infer or read memory beyond string boundaries in the .rodata section. This could potentially lead to information disclosure or denial of service. Join the discussion | CVE Database V5 | 12/08/2025, 00:00:00 UTC Added: 12/08/2025, 17:06:14 UTC |
0 NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_SSL_CTX() to return NULL. Join the discussion | CVE Database V5 | 11/24/2025, 00:00:00 UTC Added: 11/24/2025, 14:12:59 UTC |
0 CVE-2025-65495 is a high-severity vulnerability in the OISM libcoap 4.3.5 library, caused by an integer signedness error in the tls_verify_call_back() function. This flaw allows remote attackers to trigger a denial of service by sending a specially crafted TLS certificate that causes the i2d_X509() function to return -1, which is then incorrectly used as a malloc() size parameter. Exploitation requires no authentication or user interaction and can be performed remotely over the network. The vulnerability impacts the availability of applications using the affected libcoap version, potentially causing crashes or service interruptions. No known exploits are currently reported in the wild, and no patches have been published yet. European organizations relying on libcoap 4.3.5 in IoT, constrained devices, or CoAP-based communication systems are at risk. Join the discussion | CVE Database V5 | 11/24/2025, 00:00:00 UTC Added: 11/24/2025, 14:12:59 UTC |
0 A NULL pointer dereference in libcoap v4.3.5-rc2 and below allows a remote attacker to cause a denial of service via the coap_handle_request_put_block function in src/coap_block.c. Join the discussion | CVE Database V5 | 10/09/2024, 00:00:00 UTC Added: 02/25/2026, 21:43:24 UTC |
0 An issue in `coap_pdu.c` in libcoap 4.3.4 allows attackers to cause undefined behavior via a sequence of messages leading to unsigned integer overflow. Join the discussion | CVE Database V5 | 04/17/2024, 00:00:00 UTC Added: 11/04/2025, 17:43:40 UTC |
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