CVE-2024-21530 Sequential calls of encryption API (`encrypt`, `wrap`, and `dump`) result in nonce reuse
An attacker can decrypt messages by exploiting nonce reuse in the cocoon library when sequential encryption functions are called.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-21530?
CVE-2024-21530 is a medium-severity vulnerability in cocoon, published on 2 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Versions of the package cocoon before 0.4.0 are vulnerable to Reusing a Nonce, Key Pair in Encryption when the encrypt, wrap, and dump functions are sequentially called. An attacker can generate the same ciphertext by creating a new encrypted message with the same cocoon object. **Note:** The issue does NOT affect objects created with Cocoon::new which utilizes ThreadRng.
Weakness: CWE-323
Which versions are affected by CVE-2024-21530?
5 open source packages ship an affected version, including cocoon.
| Package | Affected | Fixed in |
|---|---|---|
cocoon crates.io | All versions | 0.4.0 |
cocoon crates.io | All versions | 0.4.0 |
cocoon crates.io | All versions | 0.4.0 |
cocoon crates.io | All versions | 0.4.0 |
cocoon crates.io | From 0.0.0-0 | 0.4.0 |
How do I fix CVE-2024-21530?
Upgrade cocoon to 0.4.0 or later.
Is CVE-2024-21530 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-21530 exists.
Sources
Also known as GHSA-6878-6wc2-pf5h, GHSA-r2jw-c95q-rj29, RUSTSEC-2023-0068.