CLI-beautifying ANSI escape sequences can also make your log files a security threat
Spend much time working in a command-line terminal and you're likely to have at least a passing familiarity with ANSI escape sequences. Those are the codes that can add color and other highlights to text, among performing other tasks, making your screen a little more easily readable.
Unbeknownst to some, these sequences, if ingested into logs, can corrupt those files as well as exploit buggy software accessing or processing that information, potentially. Here's why you should clean those codes out of input data before logging it. ANSI escape sequences have been used widely for decades, and can be used to do things like change text and background color, style, or even build whole GUIs in a CLI environment.at Black Hat today, ANSI escape sequences are also a security risk, and one that's been long neglected., and log files would be one thing to stuff up.
"Log files are a very, very important thing when it comes to creating a timeline of a breach," Stök said. When it comes to examining an incident or strange system behavior, Stök said, lots of people tend to start by running their logs through
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