CVE-2023-34455
HighCVSS 7.5Exploitation Probability (EPSS)
High risk75th percentile - higher than 75% of all known CVEs
Summary
The snappy-java library has a flaw related to unchecked chunk length that can lead to a critical error in versions prior to 1.1.10.1. The hasNextChunk function does not validate the chunkSize variable, which can result in a NegativeArraySizeException or OutOfMemoryError.
Risk Assessment
Organizations using the vulnerable version of snappy-java may encounter severe memory issues, potentially leading to application crashes. This can affect service availability and system stability.
Recommendation
It is recommended to upgrade to version 1.1.10.1 or later to mitigate this vulnerability. A code audit should also be conducted to identify other potential issues related to unchecked input data.
Other vulnerabilities in snappy-java
See all- CVE-2023-34454Medium
The snappy-java library has an issue with unchecked multiplications that may lead to integer overflow in versions prior to 1.1.10.1. The `compress(char[] input)` function does not check the length of the array, which can result in critical errors.
- CVE-2023-34453Medium
The snappy-java library has a vulnerability related to unchecked multiplications, which may lead to integer overflow in versions prior to 1.1.10.1. The `shuffle(int[] input)` function can cause a critical error when the array length is not properly checked.
Original NVD description (English source)
snappy-java is a fast compressor/decompressor for Java. Due to use of an unchecked chunk length, an unrecoverable fatal error can occur in versions prior to 1.1.10.1. The code in the function hasNextChunk in the fileSnappyInputStream.java checks if a given stream has more chunks to read. It does that by attempting to read 4 bytes. If it wasn’t possible to read the 4 bytes, the function returns false. Otherwise, if 4 bytes were available, the code treats them as the length of the next chunk. In the case that the `compressed` variable is null, a byte array is allocated with the size given by the input data. Since the code doesn’t test the legality of the `chunkSize` variable, it is possible to pass a negative number (such as 0xFFFFFFFF which is -1), which will cause the code to raise a `java.lang.NegativeArraySizeException` exception. A worse case would happen when passing a huge positive value (such as 0x7FFFFFFF), which would raise the fatal `java.lang.OutOfMemoryError` error. Version 1.1.10.1 contains a patch for this issue.