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A buffer overflow vulnerability exists in ReadyMedia (MiniDLNA) versions 1.1.15 through 1.3.2 due to improper validation of HTTP requests using chunked transfer encoding. The vulnerable code fails to correctly validate chunk sizes, allowing attacker-controlled values to be used in subsequent operations, which can result in out-of-bounds memory access (read/write).
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository provides a full exploit chain for CVE-2023-33476, a heap buffer overflow in ReadyMedia (MiniDLNA) versions 1.1.15 through 1.3.2. The vulnerability is triggered via specially crafted HTTP requests using chunked transfer encoding, leading to out-of-bounds read/write and ultimately remote code execution (RCE). The 'exploits' directory contains two main Python exploit scripts: - 'tpoison-nopie-x64_reverse-shell.py': Targets x86_64 Linux systems (e.g., Debian 11) running MiniDLNA 1.3.2 with partial RELRO and no PIE. It uses tcache poisoning and GOT overwrite to redirect execution to system(), resulting in a reverse shell. - 'rax30-qemu-reverse-shell.py': Targets ARM32 binaries (specifically Netgear RAX30 running MiniDLNA under QEMU), using tcache poisoning and stack pivoting to achieve RCE and a reverse shell. Both exploits require the attacker to know certain memory addresses (system(), GOT, or stack frame) and to host a listener for the reverse shell. The payload is delivered via HTTP, and the exploit scripts automate heap grooming, corruption, and payload delivery. The repository also includes a 'helper.py' with utility functions for socket management and payload construction. The 'fuzzing' directory contains harnesses and modified MiniDLNA source code for fuzzing and reproducing the vulnerability, but is not directly part of the exploit chain. The main attack vector is network-based, targeting the MiniDLNA HTTP service (default port 8200). The exploit results in a reverse shell, giving the attacker full command execution on the target system.
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