ALT-PU-2024-2536-3

Package update libuv in branch sisyphus

Version1.48.0-alt1

Published2026-02-04

Max severityHIGH

Severity:

Closed issues (2)

HIGH7.3

Уязвимость функции uv_getaddrinfo() (src/unix/getaddrinfo.c, src/win/getaddrinfo.c) библиотеки с асинхронным вводом-выводом libuv, позволяющая нарушителю осуществить SSRF-атаку

Published: 2024-04-17Modified: 2025-11-19

CVSS 3.xHIGH 7.3

CVSS:3.x/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS 2.0HIGH 7.5

CVSS:2.0/AV:N/AC:L/Au:N/C:P/I:P/A:P

References

CVE-2024-24806

HIGH7.3

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.

Published: 2024-02-07Modified: 2024-11-21

CVSS 3.xHIGH 7.3

CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

References