Bug 2263292 (CVE-2024-24806) - CVE-2024-24806 libuv: Improper Domain Lookup that potentially leads to SSRF attacks
Summary: CVE-2024-24806 libuv: Improper Domain Lookup that potentially leads to SSRF a...
Keywords:
Status: NEW
Alias: CVE-2024-24806
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2266281 2266282 2266283 2266284
Blocks: 2263293
TreeView+ depends on / blocked
 
Reported: 2024-02-08 05:05 UTC by Avinash Hanwate
Modified: 2024-02-28 13:16 UTC (History)
12 users (show)

Fixed In Version: libuv 1.48.0
Doc Type: ---
Doc Text:
A server-side request forgery (SSRF) flaw was found in the libuv package due to how the `hostname_ascii` variable is handled in `uv_getaddrinfo` and `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 that allow 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 could allow an attacker to craft payloads that resolve to unintended IP addresses, bypassing developer checks.
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Description Avinash Hanwate 2024-02-08 05:05:55 UTC
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.

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

Comment 2 Sandipan Roy 2024-02-27 12:29:42 UTC
Created libuv tracking bugs for this issue:

Affects: epel-all [bug 2266281]
Affects: fedora-all [bug 2266283]


Created nodejs:13/libuv tracking bugs for this issue:

Affects: epel-all [bug 2266282]


Created nodejs:16/libuv tracking bugs for this issue:

Affects: fedora-all [bug 2266284]


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