CVE-2023-34453 : Security Advisory and Response

A detailed look into the Integer Overflow vulnerability in the snappy-java library that can lead to a Denial of Service (DoS) attack.

Understanding CVE-2023-34453

This CVE involves an Integer Overflow vulnerability in the shuffle function of the snappy-java library that can result in a Denial of Service attack.

What is CVE-2023-34453?

snappy-java, a fast compressor/decompressor for Java, is impacted by an unchecked multiplication issue in versions prior to 1.1.10.1. The vulnerability arises due to an integer overflow in the

shuffle

function, potentially leading to a fatal error.

The Impact of CVE-2023-34453

The integer overflow can trigger fatal errors, like

java.lang.NegativeArraySizeException

or

java.lang.ArrayIndexOutOfBoundsException

, crashing the program or causing unexpected behavior due to incorrect array size.

Technical Details of CVE-2023-34453

This section covers the specifics of the vulnerability in snappy-java library.

Vulnerability Description

The

shuffle(int[] input)

function in the

BitShuffle.java

file multiplies the length by 4 without proper validation, leading to integer overflow and potential crashes.

Affected Systems and Versions

Versions prior to 1.1.10.1 of the snappy-java library are affected by this vulnerability.

Exploitation Mechanism

By manipulating the input array size, an attacker can trigger the integer overflow vulnerability, causing system crashes or unexpected behavior.

Mitigation and Prevention

Understanding how to mitigate and prevent the CVE-2023-34453 vulnerability.

Immediate Steps to Take

Developers should update to version 1.1.10.1 or later to patch the vulnerability and prevent exploitation.

Long-Term Security Practices

Implement input validation and boundary checks in code to prevent integer overflow vulnerabilities in the future.

Patching and Updates

Regularly check for updates and security advisories from the snappy-java library to stay informed about potential vulnerabilities and patches.