CVE Vulnerabilities

CVE-2023-30536

Interpretation Conflict

Published: Apr 17, 2023 | Modified: May 01, 2023
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CVSS 2.x
RedHat/V2
RedHat/V3
Ubuntu

slim/psr7 is a PSR-7 implementation for use with Slim 4. In versions prior to 1.6.1 an attacker could sneak in a newline (n) into both the header names and values. While the specification states that rnrn is used to terminate the header list, many servers in the wild will also accept nn. An attacker that is able to control the header names that are passed to Slilm-Psr7 would be able to intentionally craft invalid messages, possibly causing application errors or invalid HTTP requests being sent out with an PSR-18 HTTP client. The latter might present a denial of service vector if a remote service’s web application firewall bans the application due to the receipt of malformed requests. The issue has been patched in version 1.6.1. There are no known workarounds to this issue. Users are advised to upgrade.

Weakness

Product A handles inputs or steps differently than Product B, which causes A to perform incorrect actions based on its perception of B’s state.

Affected Software

Name Vendor Start Version End Version
Slim_psr-7 Slimframework * *

References