CVE-2025-34468

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Source
https://cve.org/CVERecord?id=CVE-2025-34468
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-34468.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-34468
Downstream
Published
2025-12-31T18:39:07Z
Modified
2026-08-12T03:51:36Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
libcoap Stack-Based Buffer Overflow in Address Resolution DoS or Potential RCE
Details

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).

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-121"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/34xxx/CVE-2025-34468.json"
}
References

Affected packages

Git / github.com/obgm/libcoap

Affected ranges

Type
GIT
Repo
https://github.com/obgm/libcoap
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
30db3ea
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:libcoap:libcoap:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "4.3.5"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-34468.json"