CVE-2024-24806
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.
| Software | From | Fixed in |
|---|---|---|
| libuv / libuv | 1.24.0 | 1.48.0 |
- http://www.openwall.com/lists/oss-security/2024/02/08/2
- http://www.openwall.com/lists/oss-security/2024/02/11/1
- http://www.openwall.com/lists/oss-security/2024/03/11/1
- https://github.com/libuv/libuv/commit/0f2d7e784a256b54b2385043438848047bc2a629
- https://github.com/libuv/libuv/commit/3530bcc30350d4a6ccf35d2f7b33e23292b9de70
- https://github.com/libuv/libuv/commit/c858a147643de38a09dd4164758ae5b685f2b488
- https://github.com/libuv/libuv/commit/e0327e1d508b8207c9150b6e582f0adf26213c39
- https://github.com/libuv/libuv/security/advisories/GHSA-f74f-cvh7-c6q6
- https://gitlab.kitware.com/cmake/cmake/-/issues/26112
- https://lists.debian.org/debian-lts-announce/2024/03/msg00005.html
- https://security.netapp.com/advisory/ntap-20240605-0008/
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A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.
CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.
A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.
Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.
Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.
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