Improper Input Validation in Apache VCL Affecting Multiple Versions

CVE-2018-11773

What is CVE-2018-11773?

Apache VCL versions ranging from 2.1 to 2.5 are susceptible to an input validation flaw during the processing of block allocation submissions. When users submit forms, the unvalidated data is passed to the PHP function strtotime, which can lead to unexpected behavior and potential exploitation. Early analyses indicated that the implementation of strtotime seemed resilient to attacks, but it is crucial for users operating VCL versions prior to 2.5.1 to apply the necessary upgrades or patches to mitigate this vulnerability. The issue was identified and reported by ADLab of Venustech.

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