Executive Summary

The vulnerability exists in GuardDog versions 2.6.0 to 2.9.0, a CLI tool used to identify malicious PyPI packages. In these versions, GuardDog includes attacker-controlled filenames, file locations, messages, and code snippets in its default human-readable output without escaping terminal control characters. This allows a malicious package to inject ANSI or OSC escape sequences into analyst terminals or CI logs.

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Impact Analysis

This vulnerability can impact you by allowing a malicious package to inject terminal control sequences into your terminal or continuous integration logs. This could lead to unexpected behavior in your terminal, potential manipulation of terminal output, or interference with log integrity, which may confuse analysts or automated systems reviewing these outputs.

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Detection Guidance

This vulnerability can be detected by examining the output of GuardDog scans for the presence of unescaped terminal control characters such as ANSI or OSC escape sequences in filenames, file locations, messages, or code snippets.

Since the vulnerability arises from the HumanReadableReporter.print_scan_results() function rendering unescaped attacker-controlled values, you can manually inspect scan outputs for suspicious terminal behavior like unexpected clearing or rewriting of terminal output or clickable hyperlinks.

No specific detection commands are provided in the available resources.

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Mitigation Strategies

Immediate mitigation involves avoiding the use of vulnerable GuardDog versions (2.6.0 to 2.9.0) or refraining from using the human-readable output feature that renders unescaped attacker-controlled values.

Since no patches or public fixes exist as of the advisory date, a suggested fix is to escape or strip terminal control characters from attacker-controlled values before rendering them in the output.

Additionally, be cautious when running GuardDog scans on untrusted packages and consider reviewing scan outputs in environments that do not interpret terminal control sequences.

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Compliance Impact

The provided information does not specify any direct impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

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