rust-openssl has incorrect bounds assertion in aes key wrap
### Summary ``aes::unwrap_key()`` has an incorrect bounds assertion on the out buffer size, which can lead to out-of-bounds write. ### Details ``aes::unwrap_key()`` contains an incorrect assertion: it checks that `out.len() + 8 <= in_.len()`, but this condition is reversed. The intended invariant is `out.len() >= in_.len() - 8`, ensuring the output buffer is large enough. Because of the inverted check, the function only accepts buffers at or below the minimum required size and rejects larger ones. If a smaller buffer is provided the function will write past the end of `out` by `in_.len() - 8 - out.len()` bytes, causing an out-of-bounds write from a safe public function. ### Impact Vulnerable applications using AES keywrap and allowing attacker controlled buffer sizes could have an attacker trigger an out-of-bounds write.
beschreibt (1)
Zugehörige CVEs.
| ID | Schweregrad | ausnutzbar | ||
|---|---|---|---|---|
| CVE-2026-41678US | high8.1 | — | ||
rust-openssl provides OpenSSL bindings for the Rust programming language. From to before 0.10.78, aes::unwrap_key() contains an incorrect assertion: it checks that out.len() + 8… | ||||
Referenzen
Externe Belege — Patches, Meldungen, Analysen.
- https://github.com/rust-openssl/rust-opensslPACKAGE
- https://github.com/rust-openssl/rust-openssl/commit/718d07ff8ff7be417d5b7a6a0047f1607520b3b6WEB
- https://github.com/rust-openssl/rust-openssl/pull/2604WEB
- https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78WEB
- https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-8c75-8mhr-p7r9WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-41678ADVISORY
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