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    CVE-2023-30362

    Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed in 4.3.1-120-ge242200 allows attackers to obtain sensitive information via malformed pdu.

    Published:Jun 23, 2023
    Last Modified:Dec 5, 2024
    EPS:Jun 23, 2023
    EPSS Score:0.0015
    CVSS Score:7.5

    Affected Products

    Vendor
    Libcoap
    Product
    Libcoap

    Exploits

    https://github.com/obgm/libcoap/issues/1063https://github.com/obgm/libcoap/issues/1063

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    Related CVEs

    CVE-2026-29013 (CVSS 8.8) — libcoap contains out-of-bounds read vulnerabilities in OSCORE Appendix B.2 CBOR unwrap handling where get_byte…
    CVE-2025-34468 (CVSS 8.2) — libcoap versions up to and including 4.3.5, prior to commit 30db3ea, contain a stack-based buffer overflow in …
    CVE-2025-59391 (CVSS 6.5) — A memory disclosure vulnerability exists in libcoap's OSCORE configuration parser in libcoap before release-4.…
    CVE-2025-65501 (CVSS 4.3) — Null pointer dereference in coap_dtls_info_callback() in OISM libcoap 4.3.5 allows remote attackers to cause a…
    CVE-2025-65496 (CVSS 4.3) — NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows rem…
    CVE-2025-65497 (CVSS 4.3) — NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows rem…
    CVE-2025-65499 (CVSS 4.3) — Array index error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attacker…
    CVE-2025-65493 (CVSS 7.5) — NULL pointer dereference in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial…
    CVE-2025-65494 (CVSS 7.5) — NULL pointer dereference in get_san_or_cn_from_cert() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remot…
    CVE-2025-65495 (CVSS 7.5) — Integer signedness error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote a…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High