Description: An attacker crafts malicious log messages with unexpected formats, excessively long fields, or special characters and sends them to the application. liblognorm attempts to parse these messages using configured rulesets. Exploitation occurs when parsing logic in liblognorm or the ruleset fails to handle these malformed messages correctly.
Impact: Application crash, unexpected behavior, resource exhaustion (CPU or memory), potential for denial of service. In severe cases, although less likely directly in liblognorm itself, vulnerabilities could be chained to exploit downstream processing of the parsed data.
Affected liblognorm component: Parsing Engine, Rule Set Processing, Input Handling.
Mitigation Strategies:
* Thoroughly test rulesets with a wide range of valid and invalid log messages, including fuzzing.
* Regularly update liblognorm to the latest version to benefit from bug fixes and security patches.
* Implement input sanitization and validation before feeding data to liblognorm to pre-filter potentially malicious inputs.
* Set limits on the maximum size of log messages processed.
* Implement error handling to gracefully manage parsing failures and prevent application crashes.
Description: An attacker crafts log messages specifically designed to trigger exponential backtracking in vulnerable regular expressions used within liblognorm rule sets. This causes the regex engine to consume excessive CPU time while attempting to match the malicious input.
Impact: Denial of service, application slowdown, resource exhaustion (CPU), potentially impacting other application components.
Affected liblognorm component: Regular Expression Engine (likely within Rule Set Engine), Rule Set Processing.
Mitigation Strategies:
* Carefully review all regular expressions in rule sets for potential ReDoS vulnerabilities.
* Use regex analysis tools to identify problematic patterns and assess regex complexity.
* Test regex performance with various inputs, including edge cases and potentially malicious patterns.
* Consider using more efficient regex patterns or alternative parsing methods if performance issues or ReDoS vulnerabilities are identified.
* Implement timeouts for regex matching operations to prevent unbounded execution.
Threat: Dependency Vulnerabilities
Description: liblognorm relies on external libraries. Vulnerabilities in these dependencies (e.g., security flaws in underlying libraries used for regex processing, memory management, or other functionalities) can indirectly affect applications using liblognorm.
Impact: Various impacts depending on the nature of the dependency vulnerability, potentially including code execution, denial of service, information disclosure, or privilege escalation.
Affected liblognorm component: Dependencies, External Libraries, Build Process.
Mitigation Strategies:
* Regularly update liblognorm and its dependencies to the latest versions to benefit from security patches.
* Use dependency scanning tools (e.g., vulnerability scanners) to identify known vulnerabilities in liblognorm's dependencies.
* Implement a vulnerability management process to promptly address identified dependency vulnerabilities.
* Monitor security advisories and vulnerability databases for updates related to liblognorm and its dependencies.