cpp-httplib has Unbounded Memory Allocation in Chunked/No-Length Requests
概要
cpp-httplib has Unbounded Memory Allocation in Chunked/No-Length Requests
原文の説明
取得元が公開している説明をそのまま載せています (多くは英語)。
cpp-httplib is a C++ header-only HTTP/HTTPS server and client library. Prior to version 0.20.1, the library fails to enforce configured size limits on incoming request bodies when Transfer-Encoding: chunked is used or when no Content-Length header is provided. A remote attacker can send a chunked request without the terminating zero-length chunk, causing uncontrolled memory allocation on the server. This leads to potential exhaustion of system memory and results in a server crash or unresponsiveness. Version 0.20.1 fixes the issue by enforcing limits during parsing. If the limit is exceeded at any point during reading, the connection is terminated immediately. A short-term workaround through a Reverse Proxy is available. If updating the library immediately is not feasible, deploy a reverse proxy (e.g., Nginx, HAProxy) in front of the cpp-httplib application. Configure the proxy to enforce maximum request body size limits, thereby stopping excessively large requests before they reach the vulnerable library code.
出典: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
ディストリビューション別の修正状況
各ディストリビューションが公開している、この CVE の修正パッケージ
- Debian DEBIAN-CVE-2025-46728 cpp-httplib
- Ubuntu UBUNTU-CVE-2025-46728 cpp-httplib
参照URL
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- patch github.com