{"id":"UBUNTU-CVE-2024-24806","details":"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.","modified":"2026-04-22T14:40:37.234335Z","published":"2024-02-07T22:15:00Z","related":["USN-6666-1"],"upstream":["CVE-2024-24806"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-24806"},{"type":"REPORT","url":"https://github.com/libuv/libuv/security/advisories/GHSA-f74f-cvh7-c6q6"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2024/02/08/2"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6666-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2024-24806"}],"affected":[{"package":{"name":"libuv1","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libuv1@1.34.2-1ubuntu1.5?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.34.2-1ubuntu1.5"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libuv1","binary_version":"1.34.2-1ubuntu1.5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-24806.json"}},{"package":{"name":"libuv1","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libuv1@1.43.0-1ubuntu0.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.43.0-1ubuntu0.1"}]}],"versions":["1.40.0-2ubuntu1","1.42.0-1","1.43.0-1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libuv1","binary_version":"1.43.0-1ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-24806.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},{"type":"Ubuntu","score":"medium"}]}