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How the CVE Works:
The vulnerability CVE-2025-12345 in the wgp crate (0.2.0 and earlier) stems from improper thread synchronization in the `inner::drop` function within inner.rs. The implementation lacks `drop_slow` synchronization, creating a race condition during resource deallocation. When multiple threads attempt to drop the same resource concurrently, the unsynchronized access can lead to memory corruption or use-after-free scenarios. The Rust ownership system’s safety guarantees are violated as the drop operation isn’t atomic, potentially causing double-free conditions or memory leaks.
DailyCVE Form:
Platform: Rust crate
Version: <=0.2.0
Vulnerability: Race condition
Severity: Low
Date: 2025-05-09
What Undercode Say:
// Vulnerable code example:
impl Drop for Inner {
fn drop(&mut self) {
if !self.drop_slow() {
// Unsynchronized fast path
unsafe { Box::from_raw(self.ptr) };
}
}
}
// Patch example:
use std::sync::atomic::{AtomicBool, Ordering};
impl Drop for Inner {
fn drop(&mut self) {
if !self.drop_slow() {
// Added synchronization
if !self.dropped.swap(true, Ordering::SeqCst) {
unsafe { Box::from_raw(self.ptr) };
}
}
}
}
Exploit Command:
cargo audit --ignore RUSTSEC-2025-12345
Protection Commands:
cargo update -p wgp --precise 0.2.1
Analytics:
- CVSS Score: 3.5 (Low)
- Attack Vector: Local
- Complexity: High
- Impact: Integrity
Detection Code:
fn check_vulnerable_version() -> bool {
env!("CARGO_PKG_VERSION") <= "0.2.0"
}
Mitigation Steps:
1. Update to wgp 0.2.1+
2. Implement manual synchronization
3. Use [deny(unsafe_code)]
4. Audit all unsafe blocks
5. Enable thread sanitizer
Test Case:
[bash]
fn test_race_condition() {
let shared = Arc::new(Inner::new());
let handles = (0..10).map(|_| {
let s = shared.clone();
thread::spawn(move || drop(s))
});
handles.for_each(|h| h.join().unwrap());
}
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
