Out-of-Bounds Memory Access in Ning Compress-LZF

Executive Summary

This vulnerability is an out-of-bounds memory access issue in the Ning compress-lzf library before version 1.2.0. It occurs in the UnsafeChunkDecoder component which fails to validate back-references and literal runs when processing LZF streams. Attackers can exploit this by providing maliciously crafted LZF streams to applications using the default LZFDecoder, potentially leaking unrelated JVM heap memory into decompressed output or crashing the JVM.

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Detection Guidance

To detect this vulnerability, check if your system uses Ning compress-lzf versions before 1.2.0. Inspect dependency files like pom.xml for Maven or build.gradle for Gradle. Use commands like 'mvn dependency:tree' or 'gradle dependencies' to list versions. If vulnerable versions are found, update to 1.2.0 or later.

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Impact Analysis

If you use applications relying on compress-lzf versions before 1.2.0, attackers could exploit this to read sensitive memory data from the JVM heap or cause the application to crash. This could lead to information disclosure or denial of service in systems processing untrusted LZF input.

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Compliance Impact

This vulnerability could lead to unauthorized disclosure of sensitive data stored in JVM heap memory, which may violate GDPR's data protection principles and HIPAA's confidentiality requirements. Uncontrolled memory access risks exposing personal or protected health information during decompression of crafted LZF streams.

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Mitigation Strategies

Immediately update Ning compress-lzf to version 1.2.0 or later. If updating is not possible, restrict input sources to trusted data only. Monitor applications using LZF streams for crashes or memory leaks. Apply patches from the GitHub pull request if available.

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