PT-2017-14948 · Vbulletin Solutions · Vbulletin
Truel_It
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Published
2017-12-14
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Updated
2018-01-02
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CVE-2017-17672
CVSS v3.1
9.8
Critical
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
vBulletin versions through 5.3.x
Description
The issue is related to an unauthenticated deserialization vulnerability. This vulnerability can lead to arbitrary file deletion and, under certain circumstances, code execution. The vulnerability is due to the unsafe usage of PHP's unserialize() function in the vB Library Template's cacheTemplates() function. This function is part of a publicly exposed API. The
templateidlist parameter in the "ajax/api/template/cacheTemplates" API endpoint is used to exploit this issue.Recommendations
For versions through 5.3.x, as a temporary workaround, consider disabling the cacheTemplates() function until a patch is available. Restrict access to the ajax/api/template/cacheTemplates API endpoint to minimize the risk of exploitation. Avoid using the
templateidlist parameter in the affected API endpoint until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.Exploit
Deserialization of Untrusted Data
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Weakness Enumeration
Related Identifiers
Affected Products
Vbulletin