CVE-2024-24806 – Improper Domain Lookup that potentially leads to SSRF attacks in libuv

https://notcve.org/view.php?id=CVE-2024-24806

libuv is a multi-platform support library with a focus on asynchronous I/O. The `uv_getaddrinfo` function in `src/unix/getaddrinfo.c` (and its windows counterpart `src/win/getaddrinfo.c`), truncates hostnames to 256 characters before calling `getaddrinfo`. This behavior can be exploited to create addresses like `0x00007f000001`, which are considered valid by `getaddrinfo` and could allow an attacker to craft payloads that resolve to unintended IP addresses, bypassing developer checks. The vulnerability arises due to how the `hostname_ascii` variable (with a length of 256 bytes) is handled in `uv_getaddrinfo` and subsequently in `uv__idna_toascii`. When the hostname exceeds 256 characters, it gets truncated without a terminating null byte. • http://www.openwall.com/lists/oss-security/2024/02/08/2 http://www.openwall.com/lists/oss-security/2024/02/11/1 http://www.openwall.com/lists/oss-security/2024/03/11/1 https://github.com/libuv/libuv/commit/0f2d7e784a256b54b2385043438848047bc2a629 https://github.com/libuv/libuv/commit/3530bcc30350d4a6ccf35d2f7b33e23292b9de70 https://github.com/libuv/libuv/commit/c858a147643de38a09dd4164758ae5b685f2b488 https://github.com/libuv/libuv/commit/e0327e1d508b8207c9150b6e582f0adf26213c39 https://github.com/libuv/libuv/secu • CWE-918: Server-Side Request Forgery (SSRF) •