Informazioni sul CVE-2023-38492
Kirby vulnerable to denial of service from unlimited password lengths
CWE ID: CWE-770
Base Score (CVSS): N/A
CVE: CVE-2023-38492
Descrizione: Kirby is a content management system. A vulnerability in versions prior to 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6 affects all Kirby sites with user accounts (unless Kirby’s API and Panel are disabled in the config). The real-world impact of this vulnerability is limited, however we still recommend to update to one of the patch releases because they also fix more severe vulnerabilities. Kirby’s authentication endpoint did not limit the password length. This allowed attackers to provide a password with a length up to the server’s maximum request body length. Validating that password against the user’s actual password requires hashing the provided password, which requires more CPU and memory resources (and therefore processing time) the longer the provided password gets. This could be abused by an attacker to cause the website to become unresponsive or unavailable. Because Kirby comes with a built-in brute force protection, the impact of this vulnerability is limited to 10 failed logins from each IP address and 10 failed logins for each existing user per hour. The problem has been patched in Kirby 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6. In all of the mentioned releases, the maintainers have added password length limits in the affected code so that passwords longer than 1000 bytes are immediately blocked, both when setting a password and when logging in.
Vettore di attacco CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Punteggio CVSS
Il CVSS è un sistema di valutazione che misura la gravità di una vulnerabilità informatica considerando fattori come l’impatto potenziale, la probabilità di attacco e la facilità di esecuzione.
Riassunto: Accesso: Network, Privilegi: None, Interazione utente: None, Confidenzialità: None, Integrità: None, Disponibilità: Low.
Dettaglio del Vettore
| Metrica | Valore | Significato | Descrizione |
|---|---|---|---|
| Attack Vector (AV) | N | Network | L’attacco può essere eseguito da remoto attraverso la rete. |
| Attack Complexity (AC) | L | Low | L’attacco non richiede condizioni particolari. |
| Privileges Required (PR) | N | None | Non sono richiesti privilegi. |
| User Interaction (UI) | N | None | Non è richiesta interazione dell’utente. |
| Scope (S) | U | Unchanged | Il raggio d’azione non cambia. |
| Confidentiality Impact (C) | N | None | Nessun impatto sulla riservatezza. |
| Integrity Impact (I) | N | None | Nessun impatto sull’integrità. |
| Availability Impact (A) | L | Low | Interferenza limitata. |
Riferimenti esterni
- https://github.com/getkirby/kirby/security/advisories/GHSA-3v6j-v3qc-cxff
- https://github.com/getkirby/kirby/commit/0e10ce3b0c2b88656564b8ff518ddc99136ac43e
- https://github.com/getkirby/kirby/releases/tag/3.5.8.3
- https://github.com/getkirby/kirby/releases/tag/3.6.6.3
- https://github.com/getkirby/kirby/releases/tag/3.7.5.2
- https://github.com/getkirby/kirby/releases/tag/3.8.4.1
- https://github.com/getkirby/kirby/releases/tag/3.9.6
Prodotti interessati
- getkirby – kirby
Relazioni con altri prodotti
Produttore:getkirby
Prodotto: kirby
Anno: 2023
CWE: CWE-770
CVSS: 0.0