CWE
918
EPSS
0.100%
Advisory Published
CVE Published
Updated

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 SoftwareAffected VersionHow to fix
Libuv Libuv>=1.45.0<1.48.0
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
1.48.0-1
1.48.0-1.1
Libuv Libuv>=1.24.0<1.48.0

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