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ac125ee29a3b934fc00f52bf56031dc837e9384d
advisory-db/crates/blake2/RUSTSEC-2019-0019.md
Tony Arcieri ac125ee29a Translate database into V3 advisory format (#420) 
As proposed in #240 and tracked in #414, this PR translates all
advisories into the new "V3" advisory format, which is based on Markdown
with leading TOML front matter.

This format makes it easier to see rendered Markdown syntax
descriptions, whether rendered by an IDE or GitHub. This should help
with both crafting advisories initially as well as review, and ideally
encourages more lengthy descriptions.

Support for this format shipped in `cargo-audit` v0.12.0 on
May 6th, 2020.
2020-10-01 18:29:11 -07:00

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[advisory]
id = "RUSTSEC-2019-0019"
package = "blake2"
aliases = ["CVE-2019-16143"]
categories = ["crypto-failure"]
date = "2019-08-25"
url = "https://github.com/RustCrypto/MACs/issues/19"

[versions]
patched = [">= 0.8.1"]

HMAC-BLAKE2 algorithms compute incorrect results

When used in conjunction with the Hash-based Message Authentication Code (HMAC), the BLAKE2b and BLAKE2s implementations in blake2 crate versions prior to v0.8.1 used an incorrect block size (32-bytes instead of 64-bytes for BLAKE2s, and 64-bytes instead of 128-bytes for BLAKE2b), causing them to miscompute the MacResult.

The v0.8.1 release of the blake2 crate uses the correct block sizes.

Note that this advisory only impacts usage of BLAKE2 with HMAC, and does not impact Digest functionality.