Directory traversal vulnerability in caloggerd in CA BrightStor ARCServe Backup 11.0, 11.1, and 11.5 allows remote attackers to append arbitrary data to arbitrary files via directory traversal sequences in unspecified input fields, which are used in log messages. NOTE: this can be leveraged for code execution in many installation environments by writing to a startup file or configuration file.
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.