GHSA-2rxc-gjrp-vjhx: Unsoundness in anstream

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1. GitHub Advisory Database
2. GitHub Reviewed
3. GHSA-2rxc-gjrp-vjhx

Unsoundness in anstream

Moderate severity GitHub Reviewed Published Dec 4, 2024 to the GitHub Advisory Database • Updated Dec 4, 2024

Package

cargo anstream (Rust)

Affected versions

< 0.6.8

Description

When given a valid UTF8 string "ö\x1b😀", the function in crates/anstream/src/adapter/strip.rs will be confused. The UTF8 bytes are \xc3\xb6 then \x1b then \xf0\x9f\x98\x80.

When looping over “non-printable bytes” \x1b\xf0 will be considered as some non-printable sequence.

This will produce a broken str from the incorrectly segmented bytes via str::from_utf8_unchecked, and that should never happen.

Full credit goes to @Ralith who reviewed this code and asked @burakemir to follow up.

References

• rust-cli/anstyle#156
• https://rustsec.org/advisories/RUSTSEC-2024-0404.html

Published to the GitHub Advisory Database

Dec 4, 2024