When doing a TFTP transfer and curl/libcurl is given a URL that contains a very long file name (longer than about 515 bytes), the file name is truncated to fit within the buffer boundaries, but the buffer size is still wrongly updated to use the untruncated length. This too large value is then used in the sendto() call, making curl attempt to send more data than what is actually put into the buffer. The endto() function will then read beyond the end of the heap based buffer. A malicious HTTP(S) server could redirect a vulnerable libcurl-using client to a crafted TFTP URL (if the client hasn't restricted which protocols it allows redirects to) and trick it to send private memory contents to a remote server over UDP. Limit curl's redirect protocols with --proto-redir and libcurl's with CURLOPT_REDIR_PROTOCOLS.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.5, indicating it can be exploited remotely over the network with relatively low complexity though user interaction is required and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), for affected systems. Impacting 1 product from haxx organizations running these solutions should prioritize assessment and patching.
First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.
2017-10-05T01:29:04.057
2025-04-20T01:37:25.860
Deferred
CVSSv3.0: 6.5 (MEDIUM)
AV:N/AC:M/Au:N/C:P/I:N/A:N
8.6
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | haxx | libcurl | 7.15.0 | Yes |
| Application | haxx | libcurl | 7.15.1 | Yes |
| Application | haxx | libcurl | 7.15.2 | Yes |
| Application | haxx | libcurl | 7.15.3 | Yes |
| Application | haxx | libcurl | 7.15.4 | Yes |
| Application | haxx | libcurl | 7.15.5 | Yes |
| Application | haxx | libcurl | 7.16.0 | Yes |
| Application | haxx | libcurl | 7.16.1 | Yes |
| Application | haxx | libcurl | 7.16.2 | Yes |
| Application | haxx | libcurl | 7.16.3 | Yes |
| Application | haxx | libcurl | 7.16.4 | Yes |
| Application | haxx | libcurl | 7.17.0 | Yes |
| Application | haxx | libcurl | 7.17.1 | Yes |
| Application | haxx | libcurl | 7.18.0 | Yes |
| Application | haxx | libcurl | 7.18.1 | Yes |
| Application | haxx | libcurl | 7.18.2 | Yes |
| Application | haxx | libcurl | 7.19.0 | Yes |
| Application | haxx | libcurl | 7.19.1 | Yes |
| Application | haxx | libcurl | 7.19.2 | Yes |
| Application | haxx | libcurl | 7.19.3 | Yes |
| Application | haxx | libcurl | 7.19.4 | Yes |
| Application | haxx | libcurl | 7.19.5 | Yes |
| Application | haxx | libcurl | 7.19.6 | Yes |
| Application | haxx | libcurl | 7.19.7 | Yes |
| Application | haxx | libcurl | 7.20.0 | Yes |
| Application | haxx | libcurl | 7.20.1 | Yes |
| Application | haxx | libcurl | 7.21.0 | Yes |
| Application | haxx | libcurl | 7.21.1 | Yes |
| Application | haxx | libcurl | 7.21.2 | Yes |
| Application | haxx | libcurl | 7.21.3 | Yes |
| Application | haxx | libcurl | 7.21.4 | Yes |
| Application | haxx | libcurl | 7.21.5 | Yes |
| Application | haxx | libcurl | 7.21.6 | Yes |
| Application | haxx | libcurl | 7.21.7 | Yes |
| Application | haxx | libcurl | 7.22.0 | Yes |
| Application | haxx | libcurl | 7.23.0 | Yes |
| Application | haxx | libcurl | 7.23.1 | Yes |
| Application | haxx | libcurl | 7.24.0 | Yes |
| Application | haxx | libcurl | 7.25.0 | Yes |
| Application | haxx | libcurl | 7.26.0 | Yes |
| Application | haxx | libcurl | 7.27.0 | Yes |
| Application | haxx | libcurl | 7.28.0 | Yes |
| Application | haxx | libcurl | 7.28.1 | Yes |
| Application | haxx | libcurl | 7.29.0 | Yes |
| Application | haxx | libcurl | 7.30.0 | Yes |
| Application | haxx | libcurl | 7.31.0 | Yes |
| Application | haxx | libcurl | 7.32.0 | Yes |
| Application | haxx | libcurl | 7.33.0 | Yes |
| Application | haxx | libcurl | 7.34.0 | Yes |
| Application | haxx | libcurl | 7.35.0 | Yes |
| Application | haxx | libcurl | 7.36.0 | Yes |
| Application | haxx | libcurl | 7.37.0 | Yes |
| Application | haxx | libcurl | 7.37.1 | Yes |
| Application | haxx | libcurl | 7.38.0 | Yes |
| Application | haxx | libcurl | 7.39 | Yes |
| Application | haxx | libcurl | 7.40.0 | Yes |
| Application | haxx | libcurl | 7.41.0 | Yes |
| Application | haxx | libcurl | 7.42.0 | Yes |
| Application | haxx | libcurl | 7.42.1 | Yes |
| Application | haxx | libcurl | 7.43.0 | Yes |
| Application | haxx | libcurl | 7.44.0 | Yes |
| Application | haxx | libcurl | 7.45.0 | Yes |
| Application | haxx | libcurl | 7.46.0 | Yes |
| Application | haxx | libcurl | 7.47.0 | Yes |
| Application | haxx | libcurl | 7.47.1 | Yes |
| Application | haxx | libcurl | 7.48.0 | Yes |
| Application | haxx | libcurl | 7.49.0 | Yes |
| Application | haxx | libcurl | 7.49.1 | Yes |
| Application | haxx | libcurl | 7.50.0 | Yes |
| Application | haxx | libcurl | 7.50.1 | Yes |
| Application | haxx | libcurl | 7.50.2 | Yes |
| Application | haxx | libcurl | 7.50.3 | Yes |
| Application | haxx | libcurl | 7.51.0 | Yes |
| Application | haxx | libcurl | 7.52.0 | Yes |
| Application | haxx | libcurl | 7.52.1 | Yes |
| Application | haxx | libcurl | 7.53.0 | Yes |
| Application | haxx | libcurl | 7.53.1 | Yes |
| Application | haxx | libcurl | 7.54.0 | Yes |
| Application | haxx | libcurl | 7.54.1 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For haxx's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.