Bug 1220056 (CVE-2024-24806) - VUL-0: CVE-2024-24806: TRACKERBUG: libuv: Improper Domain Lookup that potentially leads to SSRF attacks
Summary: VUL-0: CVE-2024-24806: TRACKERBUG: libuv: Improper Domain Lookup that potenti...
Status: NEW
Alias: CVE-2024-24806
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents (show other bugs)
Version: unspecified
Hardware: Other Other
: P3 - Medium : Normal
Target Milestone: ---
Assignee: Security Team bot
QA Contact: Security Team bot
URL: https://smash.suse.de/issue/393398/
Whiteboard: CVSSv3.1:SUSE:CVE-2024-24806:5.8:(AV:...
Keywords:
Depends on: 1219724 1220053
Blocks:
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Reported: 2024-02-19 08:43 UTC by Andrea Mattiazzo
Modified: 2024-06-04 08:25 UTC (History)
5 users (show)

See Also:
Found By: Security Response Team
Services Priority:
Business Priority:
Blocker: ---
Marketing QA Status: ---
IT Deployment: ---


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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