HIGH
GHSA-pqf5-4pqq-29f5
rust-openssl: Deriver::derive and PkeyCtxRef::derive can overflow short buffers on OpenSSL 1.1.1
Details
`Deriver::derive` (and `PkeyCtxRef::derive`) sets `len = buf.len()` and passes it as the in/out length to `EVP_PKEY_derive`, relying on OpenSSL to honor it. On OpenSSL 1.1.x, X25519, X448, DH and HKDF-extract ignore the incoming `*keylen`, unconditionally writing the full shared secret (32/56/prime-size bytes). A caller passing a short slice gets a heap/stack overflow from safe code. OpenSSL 3.x providers do check, so this only impacts older OpenSSL.
Are you affected?
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Affected packages
crates.io/openssl
Introduced in:
0.9.27Fixed in: 0.10.78Upgrade openssl to 0.10.78 or newer (ecosystem crates.io).
References
- https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-pqf5-4pqq-29f5[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2026-41676[ADVISORY]
- https://github.com/rust-openssl/rust-openssl/pull/2606[WEB]
- https://github.com/rust-openssl/rust-openssl/commit/09b425e5f59a2466d806e71a83a9a449c914c596[WEB]
- https://github.com/rust-openssl/rust-openssl[PACKAGE]
- https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78[WEB]