Search criteria
15 vulnerabilities by libcoap
CVE-2025-34468 (GCVE-0-2025-34468)
Vulnerability from cvelistv5 – Published: 2025-12-31 18:39 – Updated: 2026-01-02 14:36
VLAI?
Title
libcoap Stack-Based Buffer Overflow in Address Resolution DoS or Potential RCE
Summary
libcoap versions up to and including 4.3.5, prior to commit 30db3ea, contain a stack-based buffer overflow in address resolution when attacker-controlled hostname data is copied into a fixed 256-byte stack buffer without proper bounds checking. A remote attacker can trigger a crash and potentially achieve remote code execution depending on compiler options and runtime memory protections. Exploitation requires the proxy logic to be enabled (i.e., the proxy request handling code path in an application using libcoap).
Severity ?
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Impacted products
Credits
SecMate
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CVE-2025-59391 (GCVE-0-2025-59391)
Vulnerability from cvelistv5 – Published: 2025-12-08 00:00 – Updated: 2025-12-08 17:51
VLAI?
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.
Severity ?
6.5 (Medium)
CWE
- n/a
Assigner
References
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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-2025-65501 (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-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-2025-65498 (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-2025-65500 (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-2025-65499 (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-2025-65496 (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-2025-65497 (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-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-2024-0962 (GCVE-0-2024-0962)
Vulnerability from cvelistv5 – Published: 2024-01-27 12:31 – Updated: 2025-06-17 21:29
VLAI?
Title
obgm libcoap Configuration File coap_oscore.c get_split_entry stack-based overflow
Summary
A vulnerability was found in obgm libcoap 4.3.4. It has been rated as critical. Affected by this issue is the function get_split_entry of the file src/coap_oscore.c of the component Configuration File Handler. The manipulation leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. It is recommended to apply a patch to fix this issue. VDB-252206 is the identifier assigned to this vulnerability.
Severity ?
6.3 (Medium)
6.3 (Medium)
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
Credits
MSXF (VulDB User)
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CVE-2023-30362 (GCVE-0-2023-30362)
Vulnerability from cvelistv5 – Published: 2023-06-23 00:00 – Updated: 2024-12-05 16:59
VLAI?
Summary
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.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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CVE-2023-35862 (GCVE-0-2023-35862)
Vulnerability from cvelistv5 – Published: 2023-06-19 00:00 – Updated: 2024-12-11 16:54
VLAI?
Summary
libcoap 4.3.1 contains a buffer over-read via the function coap_parse_oscore_conf_mem at coap_oscore.c.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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