CVE-2024-24806: Improper Domain Lookup that potentially leads to SSRF attacks in libuv
First published: Wed Feb 07 2024(Updated: )
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.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ubuntu/libuv1 | <1.34.2-1ubuntu1.5 | 1.34.2-1ubuntu1.5 |
| ubuntu/libuv1 | <1.43.0-1ubuntu0.1 | 1.43.0-1ubuntu0.1 |
| ubuntu/libuv1 | <1.44.2-1ubuntu0.1 | 1.44.2-1ubuntu0.1 |
| debian/libuv1 | <=1.24.1-1+deb10u1<=1.40.0-2<=1.44.2-1 | 1.24.1-1+deb10u2 1.40.0-2+deb11u1 1.44.2-1+deb12u1 1.48.0-1 1.48.0-1.1 |
| Libuv Libuv | >=1.24.0<1.48.0 |
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Reference Links
- https://github.com/libuv/libuv/security/advisories/GHSA-f74f-cvh7-c6q6
- https://github.com/libuv/libuv/commit/6dd44caa35b4697d7e8c1b9fa0ba8e95d73355de
- https://github.com/libuv/libuv/commit/0f2d7e784a256b54b2385043438848047bc2a629
- https://github.com/libuv/libuv/commit/3530bcc30350d4a6ccf35d2f7b33e23292b9de70
- https://github.com/libuv/libuv/commit/e0327e1d508b8207c9150b6e582f0adf26213c39
- https://security-tracker.debian.org/tracker/CVE-2024-24806
- http://www.openwall.com/lists/oss-security/2024/02/08/2
- http://www.openwall.com/lists/oss-security/2024/02/11/1
- https://github.com/libuv/libuv/commit/c858a147643de38a09dd4164758ae5b685f2b488
- https://lists.debian.org/debian-lts-announce/2024/03/msg00005.html
- https://launchpad.net/bugs/cve/CVE-2024-24806
- https://ubuntu.com/security/notices/USN-6666-1
- https://www.cve.org/CVERecord?id=CVE-2024-24806
- https://nvd.nist.gov/vuln/detail/CVE-2024-24806
- https://ubuntu.com/security/CVE-2024-24806
- http://www.openwall.com/lists/oss-security/2024/03/11/1
- https://security.netapp.com/advisory/ntap-20240605-0008/
- https://gitlab.kitware.com/cmake/cmake/-/issues/26112
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