cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to version 0.30.1, a Denial of Service (DoS) vulnerability exists in cpp-httplib due to the unsafe handling of compressed HTTP request bodies (Content-Encoding: gzip, br, etc.). The library validates the payload_max_length against the compressed data size received from the network, but does not limit the size of the decompressed data stored in memory.
Weakness
The product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Cpp-httplib | Yhirose | * | 0.30.1 (excluding) |
| Cpp-httplib | Ubuntu | plucky | * |
| Cpp-httplib | Ubuntu | upstream | * |