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The vulnerability exists in the `tracing-subscriber` crate’s formatting layer. When logging events, the crate did not sanitize user-supplied input before writing it to a terminal-based output. An attacker could craft a log message containing ANSI escape sequences (e.g., `\x1b[2J` to clear screen, `\x1b]0;\x07` to set window ). Upon display in a vulnerable terminal emulator, these sequences are interpreted as commands, not text. This allows for terminal manipulation via the application’s log output. The core issue is the lack of escaping for control characters in the input data before it is written to a TTY.
Platform: Rust Crate
Version: <0.3.20
Vulnerability: Escape Injection
Severity: Medium
date: 2025-02-21
Prediction: 2025-03-07
What Undercode Say:
git clone https://github.com/tokio-rs/tracing cd tracing git log --oneline --grep="ansi" --grep="escape" --all
// Example of vulnerable logging event!( Level::INFO, message = "User input: \x1b[41;1;37mDANGEROUS_INPUT\x1b[0m" );
How Exploit:
Craft malicious log entry containing ANSI sequences like `\x1b[2J` to clear the victim’s terminal or `\x1b]0;Fake \x07` to change its , potentially obscuring activity or misleading the user.
Protection from this CVE:
Upgrade to `tracing-subscriber` version 0.3.20 or later. The patch implements proper escaping of ANSI control characters for terminal outputs.
Impact:
Terminal manipulation, screen clearing, bar spoofing. Secondary impact depends on terminal emulator vulnerabilities.
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Sources:
Reported By: github.com
Extra Source Hub:
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