PHP
CVE-2024-23336
MEDIUM
Severity by source
AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Primary rating from Vendor (github) · only source for this CVE.
CVSS VectorVendor: github
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Lifecycle Timeline
1DescriptionCVE.org
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 ($config['disallowed_remote_addresses']) contains the address 127.0.0.1, but does not include the complete block 127.0.0.0/8. MyBB 1.8.38 resolves this issue in default installations. Administrators of installed boards should update the existing configuration (inc/config.php) to include all addresses blocked by default. Additionally, users are advised to verify that it includes any other IPv4 addresses resolving to the server and other internal resources. Users unable to upgrade may manually add 127.0.0.0/8' to their disallowed address list.
AnalysisAI
MyBB is a free and open source forum software. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable.
Technical ContextAI
This vulnerability is classified under CWE-184. MyBB is a free and open source forum software. The default list of disallowed remote hosts does not contain the 127.0.0.0/8 block, which may result in a Server-Side Request Forgery (SSRF) vulnerability. The Configuration File's _Disallowed Remote Addresses_ list ($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. Affected products include: Mybb.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
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Same weakness CWE-184 – Incomplete List of Disallowed Inputs
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External POC / Exploit Code
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