REDHAT-BUG-2435961: Buffer Overflow

Stack-based buffer overflow vulnerability in libsoup’s multipart/form-data response parsing logic. The flaw exists in the soupfilterinputstreamreaduntil() function, where an incorrect length calculation may cause more data to be copied than the size of the caller-provided buffer. When a specially crafted multipart HTTP response is processed, libsoup can write past the end of a stack buffer, resulting in memory corruption. This issue can be triggered remotely without authentication or user interaction, potentially leading to application crashes or arbitrary code execution in applications that parse untrusted server responses.