SSRF in Libuv
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.020 (80.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- Libuv — versions >= 1.45.0, < 1.48.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/libuv/libuv/security/advisories/GHSA-f74f-cvh7-c6q6 (Exploit, Vendor Advisory)
- github.com/libuv/libuv/commit/0f2d7e784a256b54b2385043438848047bc2a629 (Patch)
- github.com/libuv/libuv/commit/3530bcc30350d4a6ccf35d2f7b33e23292b9de70 (Patch)
- github.com/libuv/libuv/commit/c858a147643de38a09dd4164758ae5b685f2b488 (Patch)
- github.com/libuv/libuv/commit/e0327e1d508b8207c9150b6e582f0adf26213c39 (Patch)
- www.openwall.com/lists/oss-security/2024/02/08/2 (Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2024/02/11/1 (Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2024/03/msg00005.html
- www.openwall.com/lists/oss-security/2024/03/11/1
- security.netapp.com/advisory/ntap-20240605-0008/
Frequently asked questions
- What is CVE-2024-24806?
- CVE-2024-24806 is a high-severity vulnerability in Libuv, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.3/10. Published 2024-02-07.
- How severe is CVE-2024-24806?
- High severity. CVSS v3 base score is 7.3 out of 10.
- Is CVE-2024-24806 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.