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11 vulnerabilities found for by libcoap

CVE-2025-59391 (GCVE-0-2025-59391)
Vulnerability from cvelistv5
Published
2025-12-08 00:00
Modified
2025-12-08 17:51
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
CWE
  • n/a
Summary
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.
References
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

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              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "baseScore": 6.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
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                "timestamp": "2025-12-08T17:51:22.520390Z",
                "version": "2.0.3"
              },
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          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-125",
                "description": "CWE-125 Out-of-bounds Read",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-08T17:51:29.230Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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      ],
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        }
      ],
      "problemTypes": [
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        "dateUpdated": "2025-12-08T16:56:57.443Z",
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      },
      "references": [
        {
          "url": "https://github.com/obgm/libcoap/releases/tag/v4.3.5a"
        },
        {
          "url": "https://github.com/obgm/libcoap/pull/1730"
        }
      ]
    }
  },
  "cveMetadata": {
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    "datePublished": "2025-12-08T00:00:00.000Z",
    "dateReserved": "2025-09-15T00:00:00.000Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2025-65496 (GCVE-0-2025-65496)
Vulnerability from cvelistv5
Published
2025-11-24 00:00
Modified
2025-11-24 18:26
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CWE
  • n/a
Summary
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.
References
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

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              "attackVector": "NETWORK",
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              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
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              "userInteraction": "REQUIRED",
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        }
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        {
          "url": "https://github.com/obgm/libcoap/issues/1745"
        },
        {
          "url": "https://github.com/obgm/libcoap/pull/1750"
        }
      ]
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CVE-2025-65498 (GCVE-0-2025-65498)
Vulnerability from cvelistv5
Published
2025-11-24 00:00
Modified
2025-11-24 18:26
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CWE
  • n/a
Summary
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.
References
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

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              "baseScore": 4.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
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            }
          },
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                "timestamp": "2025-11-24T18:25:52.920041Z",
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              },
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            }
          }
        ],
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                "description": "CWE-476 NULL Pointer Dereference",
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        ],
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          "dateUpdated": "2025-11-24T18:26:02.539Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
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          "vendor": "n/a",
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
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      ],
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        "dateUpdated": "2025-11-24T13:59:00.377Z",
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      },
      "references": [
        {
          "url": "https://github.com/obgm/libcoap/issues/1746"
        },
        {
          "url": "https://github.com/obgm/libcoap/pull/1750"
        }
      ]
    }
  },
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CVE-2025-65493 (GCVE-0-2025-65493)
Vulnerability from cvelistv5
Published
2025-11-24 00:00
Modified
2025-11-24 14:53
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • n/a
Summary
NULL pointer dereference in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS/TLS connection that triggers BIO_get_data() to return NULL.
References
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

{
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      {
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          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
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                "timestamp": "2025-11-24T14:52:15.897750Z",
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        },
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    ],
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CVE-2025-65497 (GCVE-0-2025-65497)
Vulnerability from cvelistv5
Published
2025-11-24 00:00
Modified
2025-11-24 18:26
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CWE
  • n/a
Summary
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.
References
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

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}

CVE-2025-65499 (GCVE-0-2025-65499)
Vulnerability from cvelistv5
Published
2025-11-24 00:00
Modified
2025-11-24 18:27
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CWE
  • n/a
Summary
Array index error in tls_verify_call_back() 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_ex_data_X509_STORE_CTX_idx() to return -1.
References
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

{
  "containers": {
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      {
        "metrics": [
          {
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              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "baseScore": 4.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
              "version": "3.1"
            }
          },
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                "id": "CVE-2025-65499",
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                "timestamp": "2025-11-24T18:27:04.923531Z",
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              },
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          }
        ],
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            "descriptions": [
              {
                "cweId": "CWE-129",
                "description": "CWE-129 Improper Validation of Array Index",
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              }
            ]
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        ],
        "providerMetadata": {
          "dateUpdated": "2025-11-24T18:27:33.150Z",
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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        }
      ],
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}

CVE-2025-65494 (GCVE-0-2025-65494)
Vulnerability from cvelistv5
Published
2025-11-24 00:00
Modified
2025-11-24 14:49
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • n/a
Summary
NULL pointer dereference in get_san_or_cn_from_cert() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted X.509 certificate that causes sk_GENERAL_NAME_value() to return NULL.
References
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

{
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            }
          },
          {
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        }
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      "problemTypes": [
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  "cveMetadata": {
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  "dataType": "CVE_RECORD",
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}

CVE-2025-65495 (GCVE-0-2025-65495)
Vulnerability from cvelistv5
Published
2025-11-24 00:00
Modified
2025-11-24 14:41
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • n/a
Summary
Integer signedness error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted TLS certificate that causes i2d_X509() to return -1 and be misused as a malloc() size parameter.
References
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "baseScore": 7.5,
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              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
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                "id": "CVE-2025-65495",
                "options": [
                  {
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                  },
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                  },
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                "role": "CISA Coordinator",
                "timestamp": "2025-11-24T14:39:26.552727Z",
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        ],
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          }
        ],
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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      }
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        {
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        }
      ],
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        {
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}

CVE-2025-65501 (GCVE-0-2025-65501)
Vulnerability from cvelistv5
Published
2025-11-24 00:00
Modified
2025-11-24 18:28
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CWE
  • n/a
Summary
Null pointer dereference in coap_dtls_info_callback() in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a DTLS handshake where SSL_get_app_data() returns NULL.
References
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
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}

CVE-2025-65500 (GCVE-0-2025-65500)
Vulnerability from cvelistv5
Published
2025-11-24 00:00
Modified
2025-11-24 18:28
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CWE
  • n/a
Summary
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.
References
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
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              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "baseScore": 4.3,
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              "confidentialityImpact": "NONE",
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              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
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        },
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      }
    ],
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        }
      ],
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}

CVE-2024-31031 (GCVE-0-2024-31031)
Vulnerability from cvelistv5
Published
2024-04-17 00:00
Modified
2025-11-04 22:06
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • n/a
Summary
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.
References
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
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              "cpe:2.3:a:libcoap:libcoap:4.3.4:*:*:*:*:*:*:*"
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            "defaultStatus": "unknown",
            "product": "libcoap",
            "vendor": "libcoap",
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              {
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              }
            ]
          }
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              "attackVector": "NETWORK",
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              "baseScore": 7.5,
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              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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            }
          },
          {
            "other": {
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                "options": [
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-04-22T19:36:57.570941Z",
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              },
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          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-190",
                "description": "CWE-190 Integer Overflow or Wraparound",
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                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:35:56.858Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        },
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      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-04T22:06:11.163Z",
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        },
        "references": [
          {
            "tags": [
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          },
          {
            "name": "FEDORA-2024-450b75e4a0",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LPENEJBV3KSASIYKNZAKXDAH7Q66KPYG/"
          },
          {
            "name": "FEDORA-2024-75863445ff",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUL7QDYFGEIJVO2ZSG4O5HEAWR6PFC52/"
          },
          {
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          }
        ],
        "title": "CVE Program Container"
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    "cna": {
      "affected": [
        {
          "product": "n/a",
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          "versions": [
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
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          "tags": [
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    "datePublished": "2024-04-17T00:00:00.000Z",
    "dateReserved": "2024-03-27T00:00:00.000Z",
    "dateUpdated": "2025-11-04T22:06:11.163Z",
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