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CVE-2024-24806

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

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.3 · High · EPSS 2.0% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • libuv

    Versions
    • >= 1.45.0, < 1.48.0: Affected

    No fix published

  • libuv1 Debian:12

    Versions
    • 1.44.2-1
    Affected ranges
    • ECOSYSTEM: < 1.44.2-1+deb12u1

    Update to 1.44.2-1+deb12u1

  • libuv1 Debian:13

    Affected ranges
    • ECOSYSTEM: < 1.48.0-1

    Update to 1.48.0-1

  • libuv1 Debian:14

    Affected ranges
    • ECOSYSTEM: < 1.48.0-1

    Update to 1.48.0-1

  • libuv1 Ubuntu:20.04:LTS

    Versions
    • 1.30.1-1
    • 1.33.1-2
    • 1.33.1-2ubuntu2
    • 1.33.1-3ubuntu1
    • 1.34.2-1ubuntu1
    • 1.34.2-1ubuntu1.1
    • 1.34.2-1ubuntu1.3
    Affected ranges
    • ECOSYSTEM: < 1.34.2-1ubuntu1.5

    Update to 1.34.2-1ubuntu1.5

  • libuv1 Ubuntu:22.04:LTS

    Versions
    • 1.40.0-2ubuntu1
    • 1.42.0-1
    • 1.43.0-1
    Affected ranges
    • ECOSYSTEM: < 1.43.0-1ubuntu0.1

    Update to 1.43.0-1ubuntu0.1

Original sources

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