Vulnerable Library - snappy-java-1.1.8.4.jar

snappy-java: A fast compression/decompression library

Library home page: https://github.com/xerial/snappy-java

Path to dependency file: /build.gradle

Path to vulnerable library: /home/wss-scanner/.gradle/caches/modules-2/files-2.1/org.xerial.snappy/snappy-java/1.1.8.4/66f0d56454509f6e36175f2331572e250e04a6cc/snappy-java-1.1.8.4.jar

Dependency Hierarchy:

• ❌ snappy-java-1.1.8.4.jar (Vulnerable Library)

Found in HEAD commit: b4413a769a13ddee13ac168bdb4ef94b4248a169

Found in base branch: main

Vulnerability Details

snappy-java is a fast compressor/decompressor for Java. Due to unchecked multiplications, an integer overflow may occur in versions prior to 1.1.10.1, causing an unrecoverable fatal error.

The function compress(char[] input) in the file Snappy.java receives an array of characters and compresses it. It does so by multiplying the length by 2 and passing it to the rawCompress` function.

Since the length is not tested, the multiplication by two can cause an integer overflow and become negative. The rawCompress function then uses the received length and passes it to the natively compiled maxCompressedLength function, using the returned value to allocate a byte array.

Since the maxCompressedLength function treats the length as an unsigned integer, it doesn’t care that it is negative, and it returns a valid value, which is casted to a signed integer by the Java engine. If the result is negative, a java.lang.NegativeArraySizeException exception will be raised while trying to allocate the array buf. On the other side, if the result is positive, the buf array will successfully be allocated, but its size might be too small to use for the compression, causing a fatal Access Violation error.

The same issue exists also when using the compress functions that receive double, float, int, long and short, each using a different multiplier that may cause the same issue. The issue most likely won’t occur when using a byte array, since creating a byte array of size 0x80000000 (or any other negative value) is impossible in the first place.

Version 1.1.10.1 contains a patch for this issue.

Publish Date: 2023-06-15

URL: CVE-2023-34454

CVSS 3 Score Details (5.9)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: High

Suggested Fix

Type: Upgrade version

Origin: GHSA-fjpj-2g6w-x25r

Release Date: 2023-06-15

Fix Resolution: org.xerial.snappy:snappy-java:1.1.10.1