Bug 1220056 (CVE-2024-24806)

Summary:	VUL-0: CVE-2024-24806: TRACKERBUG: libuv: Improper Domain Lookup that potentially leads to SSRF attacks
Product:	[Novell Products] SUSE Security Incidents	Reporter:	Andrea Mattiazzo <andrea.mattiazzo>
Component:	Incidents	Assignee:	Security Team bot <security-team>
Status:	NEW ---	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P3 - Medium	CC:	andrea.mattiazzo, meissner, osukup, security-team, smash_bz
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/393398/
Whiteboard:	CVSSv3.1:SUSE:CVE-2024-24806:5.8:(AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---
Bug Depends on:	1219724, 1220053
Bug Blocks:

Description Andrea Mattiazzo 2024-02-19 08:43:05 UTC

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.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-24806
https://github.com/libuv/libuv/security/advisories/GHSA-f74f-cvh7-c6q6
https://www.cve.org/CVERecord?id=CVE-2024-24806
https://bugzilla.redhat.com/show_bug.cgi?id=2263292

Patch:
https://github.com/libuv/libuv/commit/3530bcc30350d4a6ccf35d2f7b33e23292b9de70
https://github.com/libuv/libuv/commit/e0327e1d508b8207c9150b6e582f0adf26213c39
https://github.com/libuv/libuv/commit/0f2d7e784a256b54b2385043438848047bc2a629