CVE-2025-34468— libcoap Stack-Based Buffer Overflow in Address Resolution DoS or Potential RCE
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2025-34468
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
libcoap Stack-Based Buffer Overflow in Address Resolution DoS or Potential RCE
Source: NVD (National Vulnerability Database)
Vulnerability Description
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).
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
栈缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
libcoap 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libcoap是obgm开源的一个轻量级应用程序协议的 C 实现。 libcoap 4.3.5及之前版本存在安全漏洞，该漏洞源于地址解析时存在栈缓冲区溢出，可能导致崩溃或远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-34468
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2025-34468
请登录查看更多情报信息。
- https://github.com/obgm/libcoap/pull/1737issue-tracking
- https://libcoap.net/product
- https://nvd.nist.gov/vuln/detail/CVE-2025-34468
IV. Related Vulnerabilities
Same weakness: CWE-121
- CVE-2026-8258
Squirrel sqstdstring.cpp validate_format stack-based overflo - CVE-2026-8234
EFM ipTIME A8004T WifiBasicSet formWifiBasicSet stack-based - CVE-2026-6665
PgBouncer buffer overflow in SCRAM - CVE-2026-41509
Integer underflow in crypto_sign_open() leads to buffer over - CVE-2026-8138
Tenda CX12L SetPptpServerCfg” formSetPPTPServer stack-based
V. Comments for CVE-2025-34468
No comments yet