Search criteria
39 vulnerabilities found for libcoap by libcoap
FKIE_CVE-2025-65496
Vulnerability from fkie_nvd - Published: 2025-11-24 14:15 - Updated: 2025-12-01 17:00
Severity ?
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
| URL | Tags | ||
|---|---|---|---|
| cve@mitre.org | https://github.com/obgm/libcoap/issues/1745 | Issue Tracking | |
| cve@mitre.org | https://github.com/obgm/libcoap/pull/1750 | Issue Tracking, Patch |
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FKIE_CVE-2025-65499
Vulnerability from fkie_nvd - Published: 2025-11-24 14:15 - Updated: 2025-12-01 16:29
Severity ?
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
| URL | Tags | ||
|---|---|---|---|
| cve@mitre.org | https://github.com/obgm/libcoap/issues/1747 | Issue Tracking | |
| cve@mitre.org | https://github.com/obgm/libcoap/pull/1750 | Issue Tracking, Patch |
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FKIE_CVE-2025-65498
Vulnerability from fkie_nvd - Published: 2025-11-24 14:15 - Updated: 2025-12-01 16:31
Severity ?
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
| URL | Tags | ||
|---|---|---|---|
| cve@mitre.org | https://github.com/obgm/libcoap/issues/1746 | Issue Tracking | |
| cve@mitre.org | https://github.com/obgm/libcoap/pull/1750 | Issue Tracking, Patch |
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FKIE_CVE-2025-65501
Vulnerability from fkie_nvd - Published: 2025-11-24 14:15 - Updated: 2025-12-01 16:18
Severity ?
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
| URL | Tags | ||
|---|---|---|---|
| cve@mitre.org | https://github.com/obgm/libcoap/issues/1748 | Issue Tracking | |
| cve@mitre.org | https://github.com/obgm/libcoap/pull/1750 | Issue Tracking |
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FKIE_CVE-2025-65500
Vulnerability from fkie_nvd - Published: 2025-11-24 14:15 - Updated: 2025-12-01 16:28
Severity ?
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
| URL | Tags | ||
|---|---|---|---|
| cve@mitre.org | https://github.com/obgm/libcoap/issues/1746 | Issue Tracking | |
| cve@mitre.org | https://github.com/obgm/libcoap/pull/1750 | Issue Tracking, Patch |
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FKIE_CVE-2025-65497
Vulnerability from fkie_nvd - Published: 2025-11-24 14:15 - Updated: 2025-12-01 16:55
Severity ?
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
| URL | Tags | ||
|---|---|---|---|
| cve@mitre.org | https://github.com/obgm/libcoap/issues/1745 | Issue Tracking | |
| cve@mitre.org | https://github.com/obgm/libcoap/pull/1750 | Issue Tracking, Patch |
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FKIE_CVE-2025-65495
Vulnerability from fkie_nvd - Published: 2025-11-24 14:15 - Updated: 2025-12-01 17:15
Severity ?
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
| URL | Tags | ||
|---|---|---|---|
| cve@mitre.org | https://github.com/obgm/libcoap/issues/1744 | Issue Tracking | |
| cve@mitre.org | https://github.com/obgm/libcoap/pull/1750 | Issue Tracking, Patch |
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FKIE_CVE-2025-65493
Vulnerability from fkie_nvd - Published: 2025-11-24 14:15 - Updated: 2025-12-01 17:38
Severity ?
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
| URL | Tags | ||
|---|---|---|---|
| cve@mitre.org | https://github.com/obgm/libcoap/issues/1743 | Issue Tracking | |
| cve@mitre.org | https://github.com/obgm/libcoap/pull/1750 | Issue Tracking, Patch |
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FKIE_CVE-2025-65494
Vulnerability from fkie_nvd - Published: 2025-11-24 14:15 - Updated: 2025-12-01 17:17
Severity ?
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
| URL | Tags | ||
|---|---|---|---|
| cve@mitre.org | https://github.com/obgm/libcoap/issues/1745 | Issue Tracking | |
| cve@mitre.org | https://github.com/obgm/libcoap/pull/1750 | Issue Tracking, Patch |
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FKIE_CVE-2024-31031
Vulnerability from fkie_nvd - Published: 2024-04-17 19:15 - Updated: 2025-11-04 22:16
Severity ?
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 | |
|---|---|---|---|
| libcoap | libcoap | 4.3.4 | |
| fedoraproject | fedora | 39 | |
| fedoraproject | fedora | 40 |
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CVE-2025-65495 (GCVE-0-2025-65495)
Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 14:41
VLAI?
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.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
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CVE-2025-65498 (GCVE-0-2025-65498)
Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:26
VLAI?
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.
Severity ?
4.3 (Medium)
CWE
- n/a
Assigner
References
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CVE-2025-65497 (GCVE-0-2025-65497)
Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:26
VLAI?
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.
Severity ?
4.3 (Medium)
CWE
- n/a
Assigner
References
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CVE-2025-65496 (GCVE-0-2025-65496)
Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:26
VLAI?
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.
Severity ?
4.3 (Medium)
CWE
- n/a
Assigner
References
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CVE-2025-65493 (GCVE-0-2025-65493)
Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 14:53
VLAI?
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.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
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CVE-2025-65499 (GCVE-0-2025-65499)
Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:27
VLAI?
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.
Severity ?
4.3 (Medium)
CWE
- n/a
Assigner
References
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CVE-2025-65494 (GCVE-0-2025-65494)
Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 14:49
VLAI?
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.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
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CVE-2025-65500 (GCVE-0-2025-65500)
Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:28
VLAI?
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.
Severity ?
4.3 (Medium)
CWE
- n/a
Assigner
References
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CVE-2025-65501 (GCVE-0-2025-65501)
Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:28
VLAI?
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.
Severity ?
4.3 (Medium)
CWE
- n/a
Assigner
References
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CVE-2024-31031 (GCVE-0-2024-31031)
Vulnerability from cvelistv5 – Published: 2024-04-17 00:00 – Updated: 2025-11-04 22:06
VLAI?
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.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
| URL | Tags | |
|---|---|---|
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CVE-2025-65495 (GCVE-0-2025-65495)
Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 14:41
VLAI?
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.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
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CVE-2025-65498 (GCVE-0-2025-65498)
Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:26
VLAI?
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.
Severity ?
4.3 (Medium)
CWE
- n/a
Assigner
References
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CVE-2025-65497 (GCVE-0-2025-65497)
Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:26
VLAI?
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.
Severity ?
4.3 (Medium)
CWE
- n/a
Assigner
References
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CVE-2025-65496 (GCVE-0-2025-65496)
Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:26
VLAI?
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.
Severity ?
4.3 (Medium)
CWE
- n/a
Assigner
References
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CVE-2025-65493 (GCVE-0-2025-65493)
Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 14:53
VLAI?
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.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
{
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"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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CVE-2025-65499 (GCVE-0-2025-65499)
Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:27
VLAI?
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.
Severity ?
4.3 (Medium)
CWE
- n/a
Assigner
References
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CVE-2025-65494 (GCVE-0-2025-65494)
Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 14:49
VLAI?
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.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
{
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CVE-2025-65500 (GCVE-0-2025-65500)
Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:28
VLAI?
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.
Severity ?
4.3 (Medium)
CWE
- n/a
Assigner
References
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CVE-2025-65501 (GCVE-0-2025-65501)
Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:28
VLAI?
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.
Severity ?
4.3 (Medium)
CWE
- n/a
Assigner
References
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CVE-2024-31031 (GCVE-0-2024-31031)
Vulnerability from nvd – Published: 2024-04-17 00:00 – Updated: 2025-11-04 22:06
VLAI?
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.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
| URL | Tags | |
|---|---|---|
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