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Fencer Intel
medium —

GHSA-2rxc-gjrp-vjhx json

Unsoundness in anstream

published 2y ago modified 2mo ago also RUSTSEC-2024-0404

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
—
no score, EPSS covers CVEs only
public exploits
0
none known

Summary

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.

Patch / fix

  • crates.io anstream 0.6.8

Is GHSA-2rxc-gjrp-vjhx in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Affected packages

ecosystem package affected fixed in
crates.io anstream
<0.6.8
>=0.0.0-0, <0.6.8
0.6.8

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.