CVE-2019-16143 Algorithms compute incorrect results in blake2
The Rust blake2 crate produces incorrect HMAC results due to wrong block sizes, compromising cryptographic integrity for users of the library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-16143?
CVE-2019-16143 is a critical vulnerability in n/a, published on 9 Sep 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in the blake2 crate before 0.8.1 for Rust. The BLAKE2b and BLAKE2s algorithms, when used with HMAC, produce incorrect results because the block sizes are half of the required sizes.
Weakness: CWE-327
Which versions are affected by CVE-2019-16143?
3 open source packages ship an affected version, including blake2. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
blake2 crates.io | All versions | 0.8.1 |
blake2 crates.io | All versions | 0.8.1 |
blake2 crates.io | From 0.0.0-0 | 0.8.1 |
Products include Blake2 Blake2-Rust.
How do I fix CVE-2019-16143?
Upgrade blake2 to 0.8.1 or later.
Is CVE-2019-16143 being exploited?
There is no known exploitation of CVE-2019-16143 in the wild and no public exploit code.
Sources
Also known as GHSA-4x25-pvhw-5224, RUSTSEC-2019-0019.