CVE-2024-21631 – vapor

Package

Manager: swift
Name: vapor
Vulnerable Version: >=0 <4.90.0

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00557 pctl0.6719

Details

Vapor contains an integer overflow in URI leading to potential host spoofing Vapor's `vapor_urlparser_parse` function uses `uint16_t` indexes when parsing a URI's components, which may cause integer overflows when parsing untrusted inputs. This vulnerability does not affect Vapor directly but could impact applications relying on the URI type for validating user input. The URI type is used in several places in Vapor. A developer may decide to use URI to represent a URL in their application (especially if that URL is then passed to the HTTP Client) and rely on its public properties and methods. However, URI may fail to properly parse a valid (albeit abnormally long) URL, due to string ranges being converted to 16-bit integers. An attacker may use this behaviour to trick the application into accepting a URL to an untrusted destination. By padding the port number with zeros, an attacker can cause an integer overflow to occur when the URL authority is parsed and, as a result, spoof the host. ### Impact Users attempting to treat untrusted input as a URI are vulnerable to a host spoofing attack due to an integer overflow. ### Workarounds Validate user input before parsing as a URI or, if possible, use Foundation's `URL` and `URLComponents` utilities.

Metadata

Created: 2024-01-03T21:44:35Z
Modified: 2024-02-09T00:29:14Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/01/GHSA-r6r4-5pr8-gjcp/GHSA-r6r4-5pr8-gjcp.json
CWE IDs: ["CWE-1104", "CWE-190"]
Alternative ID: GHSA-r6r4-5pr8-gjcp
Finding: F111
Auto approve: 1