CVE-2024-23336 (GCVE-0-2024-23336)

Vulnerability from cvelistv5 – Published: 2024-05-01 06:27 – Updated: 2024-08-01 22:59
VLAI?
Title
Incomplete disallowed remote addresses list in MyBB
Summary
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.
Severity ?
5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
  • CWE-184 - Incomplete List of Disallowed Inputs
Assigner
References
Impacted products
Vendor Product Version
mybb mybb Affected: < 1.8.38
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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