Bug 2263292 (CVE-2024-24806)

Summary:	CVE-2024-24806 libuv: Improper Domain Lookup that potentially leads to SSRF attacks
Product:	[Other] Security Response	Reporter:	Avinash Hanwate <ahanwate>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bdettelb, caswilli, dfreiber, drow, fjansen, jburrell, jmitchel, jsherril, jtanner, kaycoth, kshier, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2266281, 2266282, 2266283, 2266284
Bug Blocks:	2263293

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]

Comment 4 errata-xmlrpc 2024-07-02 15:24:50 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:4247 https://access.redhat.com/errata/RHSA-2024:4247

Comment 5 errata-xmlrpc 2024-07-23 16:22:38 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:4756 https://access.redhat.com/errata/RHSA-2024:4756

Comment 6 errata-xmlrpc 2024-10-15 11:49:11 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Extended Update Support

Via RHSA-2024:8132 https://access.redhat.com/errata/RHSA-2024:8132