CVE-2026-41678— rust-openssl: Incorrect bounds assertion in aes key wrap

rust-openssl: Incorrect bounds assertion in aes key wrap

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 <= 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. This vulnerability is fixed in 0.10.78.

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跨界内存写

rust-openssl 缓冲区错误漏洞

rust-openssl是rust-openssl开源的一个用于与 OpenSSL 库进行交互的库。 rust-openssl 0.10.78之前版本存在缓冲区错误漏洞，该漏洞源于aes::unwrap_key()包含一个错误的断言，检查out.len() + 8 <= in_.len()但此条件相反，导致函数仅接受等于或低于最小所需大小的缓冲区，提供更小缓冲区时函数会写入超出out末尾的数据，导致越界写入。

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