RUSTSEC-2021-0131: Integer overflow in the bundled Brotli C library

[github-actions]

Integer overflow in the bundled Brotli C library

Details
Package	brotli-sys
Version	0.3.2
URL	bitemyapp/brotli2-rs#45
Date	2021-12-20

A buffer overflow exists in the Brotli library versions prior to 1.0.8 where an attacker controlling the input length of a "one-shot" decompression request to a script can trigger a crash, which happens when copying over chunks of data larger than 2 GiB.

An updated version of brotli-sys has not been released. If one cannot update the C library, its authors recommend to use the "streaming" API as opposed to the "one-shot" API, and impose chunk size limits.

In Rust the issue can be mitigated by migrating to the brotli crate, which provides a Rust implementation of Brotli compression and decompression that is not affected by this issue.

See advisory page for additional details.

[mellowagain]

Dependency graph:

• actix-web 3.3.2
  • actix-http 2.2.0
    • brotli2 0.3.2
      • brotli-sys 0.3.2 (affected crate)

[mellowagain]

Upstream issue: actix/actix-web#2537 (closed)

Currently waiting for upstream to release a new actix-web beta which includes this fix.

[mellowagain]

Updated to actix-web 4.0.0-rc.1 which includes the fix for this issue in b7717e4, closing.