CVE-2023-30536
Publication date 17 April 2023
Last updated 24 July 2024
Ubuntu priority
Cvss 3 Severity Score
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 \r\n\r\n is used to terminate the header list, many servers in the wild will also accept \n\n. 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.
Status
Package | Ubuntu Release | Status |
---|---|---|
php-slim-psr7 | 25.04 plucky |
Not affected
|
24.04 LTS noble |
Needs evaluation
|
|
22.04 LTS jammy | Not in release | |
20.04 LTS focal | Not in release | |
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Ignored end of standard support | |
14.04 LTS trusty | Ignored end of standard support |
Severity score breakdown
Parameter | Value |
---|---|
Base score |
|
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | Low |
Availability impact | Low |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
References
Other references
- https://github.com/slimphp/Slim-Psr7/security/advisories/GHSA-q2qj-628g-vhfw
- https://github.com/slimphp/Slim-Psr7/commit/4fea29e910391b1883de5bf6e84b50f6900355fb (1.6.1)
- https://www.rfc-editor.org/rfc/rfc7230#section-3.2.4
- https://github.com/slimphp/Slim-Psr7/commit/ed1d553225dd190875d8814c47460daed4b550bb
- https://www.cve.org/CVERecord?id=CVE-2023-30536