// For flags

CVE-2024-23336

Incomplete disallowed remote addresses list in MyBB

Severity Score

5.0
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

MyBB is a free and open source forum software. The default list of disallowed remote hosts does not contain the `127.0.0.0/8` block, which may result in a Server-Side Request Forgery (SSRF) vulnerability. The Configuration File's _Disallowed Remote Addresses_ list (`$config['disallowed_remote_addresses']`) contains the address `127.0.0.1`, but does not include the complete block `127.0.0.0/8`. MyBB 1.8.38 resolves this issue in default installations. Administrators of installed boards should update the existing configuration (`inc/config.php`) to include all addresses blocked by default. Additionally, users are advised to verify that it includes any other IPv4 addresses resolving to the server and other internal resources. Users unable to upgrade may manually add 127.0.0.0/8' to their disallowed address list.

MyBB es un software de foro gratuito y de código abierto. La lista predeterminada de hosts remotos no permitidos no contiene el bloque `127.0.0.0/8`, lo que puede provocar una vulnerabilidad de Server Side Request Forgery (SSRF). La lista de _Direcciones remotas no permitidas_ del archivo de configuración ("$config['disallowed_remote_addresses']`) contiene la dirección `127.0.0.1`, pero no incluye el bloque completo `127.0.0.0/8`. MyBB 1.8.38 resuelve este problema en las instalaciones predeterminadas. Los administradores de las placas instaladas deben actualizar la configuración existente (`inc/config.php`) para incluir todas las direcciones bloqueadas de forma predeterminada. Además, se recomienda a los usuarios que verifiquen que incluya otras direcciones IPv4 que se resuelvan en el servidor y otros recursos internos. Los usuarios que no puedan actualizar pueden agregar manualmente 127.0.0.0/8' a su lista de direcciones no permitidas.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-01-15 CVE Reserved
  • 2024-05-01 CVE Published
  • 2024-05-01 EPSS Updated
  • 2024-08-01 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-184: Incomplete List of Disallowed Inputs
  • CWE-918: Server-Side Request Forgery (SSRF)
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Mybb
Search vendor "Mybb"
Mybb
Search vendor "Mybb" for product "Mybb"
< 1.8.38
Search vendor "Mybb" for product "Mybb" and version " < 1.8.38"
en
Affected