CVE Vulnerabilities

CVE-2023-0040

Improper Neutralization of CRLF Sequences ('CRLF Injection')

Published: Jan 18, 2023 | Modified: Nov 21, 2024
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.x
RedHat/V2
RedHat/V3
Ubuntu

Versions of Async HTTP Client prior to 1.13.2 are vulnerable to a form of targeted request manipulation called CRLF injection. This vulnerability was the result of insufficient validation of HTTP header field values before sending them to the network. Users are vulnerable if they pass untrusted data into HTTP header field values without prior sanitisation. Common use-cases here might be to place usernames from a database into HTTP header fields. This vulnerability allows attackers to inject new HTTP header fields, or entirely new requests, into the data stream. This can cause requests to be understood very differently by the remote server than was intended. In general, this is unlikely to result in data disclosure, but it can result in a number of logical errors and other misbehaviours.

Weakness

The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.

Affected Software

Name Vendor Start Version End Version
Async-http-client Asynchttpclient_project * 1.4.1 (excluding)
Async-http-client Asynchttpclient_project 1.5.0 (including) 1.9.1 (excluding)
Async-http-client Asynchttpclient_project 1.10.0 (including) 1.12.1 (excluding)
Async-http-client Asynchttpclient_project 1.13.0 (including) 1.13.2 (excluding)

Potential Mitigations

References