CVE-2025-63095
📋 TL;DR
An improper input validation vulnerability 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 crafted input. This affects any application or system using this specific version of the video codec library. The vulnerability stems from insufficient validation of input parameters to the write_bits function.
💻 Affected Systems
- Tempus Ex hello-video-codec
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption through application crash or resource exhaustion, potentially affecting dependent services.
Likely Case
Application instability or crashes when processing maliciously crafted video data, leading to service interruptions.
If Mitigated
Minimal impact with proper input validation and error handling in place.
🎯 Exploit Status
The vulnerability is in a public library with available source code, making exploitation straightforward for attackers with access to the code.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider implementing input validation in your application or finding alternative libraries.
🔧 Temporary Workarounds
Implement Input Validation
allAdd validation checks for input parameters before calling write_bits() function.
// Example Rust code: validate 'bits' parameter range
if bits > MAX_BITS || bits < 0 { return Err(InvalidInput); }
🧯 If You Can't Patch
- Isolate the vulnerable component in a sandboxed environment to limit impact.
- Implement network segmentation to restrict access to systems using the vulnerable library.
🔍 How to Verify
Check if Vulnerable:
Check Cargo.toml or package dependencies for 'hello-video-codec = "0.1.0"'.Check Version:
grep -r "hello-video-codec" Cargo.tomlVerify Fix Applied:
Verify that input validation has been implemented in the write_bits() function call chain.📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults
- Unexpected termination of video processing services
Network Indicators:
- Increased error rates in video streaming services
- Service unavailability alerts
SIEM Query:
source="application.log" AND ("segmentation fault" OR "panic" OR "abort") AND process="*video*"🔗 References
- https://gist.github.com/thesmartshadow/b092e2493821491b981a069847a33064
- https://github.com/tempus-ex/hello-video-codec
- https://github.com/tempus-ex/hello-video-codec/blob/3e9551c699311ea12ad7f2fce9562fbc990d524c/src/bitstream.rs
- https://github.com/tempus-ex/hello-video-codec/tree/3e9551c699311ea12ad7f2fce9562fbc990d524c
