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https://issues.apache.org/jira/browse/CODEC-318?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gary D. Gregory resolved CODEC-318.
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Resolution: Information Provided
> Possible path traversal vulnerability in the Digest class CLI
> -------------------------------------------------------------
>
> Key: CODEC-318
> URL: https://issues.apache.org/jira/browse/CODEC-318
> Project: Commons Codec
> Issue Type: Improvement
> Reporter: Sheung Chi Chan
> Priority: Trivial
>
> The {{Digest}} class in the {{cli}} package provides a CLI for calculating a
> message digest with the support of {{DigestUtils}} class. The CLI takes in a
> list of arguments from the users and stores them, assuming all the arguments
> are local file paths for message digestion calculation. These file paths are
> stored as object variables and are processed one by one in the run method.
> The run method opens each of the file paths, reads the content and calculates
> message digests using the {{DigestUtils}} class. All file paths are never
> checked nor sanitized and are directly passed and controlled by the CLI
> users. This opens up vulnerability for path traversal attacks because the
> user of the CLI has full control of the path string. Considering that Apache
> Commons Codec is meant to be used as a library by a general developer, the
> existence of a vulnerable CLI in the library could open up the path traversal
> vulnerability to an attacker on any application adopting the libraries and
> gain illegal access in the execution environment.
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