CVE-2024-24806

Name	CVE-2024-24806
Description	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. As a result attackers may be able to access internal APIs or for websites (similar to MySpace) that allows users to have `username.example.com` pages. Internal services that crawl or cache these user pages can be exposed to SSRF attacks if a malicious user chooses a long vulnerable username. This issue has been addressed in release version 1.48.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-3752-1, DSA-5638-1
Debian Bugs	1063484

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libuv1 (PTS)	stretch	1.9.1-3	fixed
	buster (security), buster, buster (lts)	1.24.1-1+deb10u2	fixed
	bullseye (security), bullseye	1.40.0-2+deb11u1	fixed
	bookworm (security), bookworm	1.44.2-1+deb12u1	fixed
	sid, trixie	1.48.0-7	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
libuv1	source	stretch	(not affected)
libuv1	source	buster	1.24.1-1+deb10u2	DLA-3752-1
libuv1	source	bullseye	1.40.0-2+deb11u1	DSA-5638-1
libuv1	source	bookworm	1.44.2-1+deb12u1	DSA-5638-1
libuv1	source	(unstable)	1.48.0-1		1063484

Notes

https://github.com/libuv/libuv/security/advisories/GHSA-f74f-cvh7-c6q6
Introduced by: https://github.com/libuv/libuv/commit/6dd44caa35b4697d7e8c1b9fa0ba8e95d73355de (v1.24.0)
Fixed by: https://github.com/libuv/libuv/commit/0f2d7e784a256b54b2385043438848047bc2a629 (v1.48.0)
Fixed by: https://github.com/libuv/libuv/commit/3530bcc30350d4a6ccf35d2f7b33e23292b9de70 (v1.48.0)
Fixed by: https://github.com/libuv/libuv/commit/e0327e1d508b8207c9150b6e582f0adf26213c39 (v1.48.0)
[stretch] - libuv1 <not-affected> (Vulnerable code was introduced later)