PT-2024-18983 · Vapor · Vapor
Baarde
·
Published
2024-01-03
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Updated
2024-01-10
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CVE-2024-21631
CVSS v3.1
6.5
Medium
| Vector | AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
Name of the Vulnerable Software and Affected Versions
Vapor versions prior to 4.90.0
Description
Vapor is an HTTP web framework for Swift. The
vapor urlparser parse function uses uint16 t indexes when parsing a URI's components, which may cause integer overflows when parsing untrusted inputs. This issue 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, and 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 behavior 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.Recommendations
For versions prior to 4.90.0, update to version 4.90.0 to resolve the issue.
As a temporary workaround, validate user input before parsing as a URI or, if possible, use Foundation's
URL and URLComponents utilities.Exploit
Fix
RCE
Integer Overflow
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Related Identifiers
Affected Products
Vapor