Type securityvulns
Reporter Securityvulns
Modified 2010-12-24T00:00:00


PR10-04 Directory traversal limited to file validation within Viva thumbs WordPress add-on

Advisory publicly released: Tuesday, 21 December 2010 Vulnerability found: Thursday, 4 February 2010 Vendor informed: Monday, 8 February 2010 Severity level: Low/Medium Credits Richard Brain of ProCheckUp Ltd ( Description Viva Thumbs resizes and display images, as part of a popular WordPress plugin.ProCheckUp has discovered that Viva Thumbs is vulnerable to a directory traversal attack within the image display functionality, the directory traversal attack is limited to file existence validation.

Note: tested on Viva Thumbs running on the Linux operating system. Proof of concept The following demonstrate the traversal flaw:

1) Vulnerable to directory traversal

Consequences: The existance of files can be validated on the system, outside the WordPress webroot. How to fix None available References

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