This vulnerability allows an integer overflow to occur in Xerial Snappy-Java, a fast compressor/decompressor for Java. The issue arises from unchecked multiplications within the function `shuffle(int[] input)` in the file `BitShuffle.java`. Specifically, the function multiplies the length of an integer array by four before passing it to a natively compiled shuffle function. Since the length is not validated, this multiplication can lead to an integer overflow, resulting in a smaller value than the actual size, or potentially zero or negative.
When a negative value occurs, a `java.lang.NegativeArraySizeException` may be thrown, causing the program to crash. If the resulting value is zero or too small, subsequent code that references the shuffled array could lead to exceptions such as `java.lang.ArrayIndexOutOfBoundsException`. This vulnerability affects all versions of Snappy-Java prior to version 1.1.10.1, which contains a patch addressing this issue.
The CVSS score assigned to this vulnerability is 5.9, classified as medium severity, indicating that while it is not critical, it poses notable risks to availability. Organizations utilizing affected versions should address this issue in their patching cycles.
Risk to organizations includes potential service disruptions due to application crashes, highlighting the importance of immediate patching. Given the nature of the vulnerability, it is crucial for security teams to monitor for updates and apply fixes to maintain system stability and reliability.
Organizations should prioritize patching immediately.
Vulnerability Details
The vulnerability was published on June 15, 2023, and is classified under CWE-190 (Integer Overflow or Wraparound). The attack vector is categorized as network-based, with a low attack complexity and no privileges required. The availability impact is high, while confidentiality and integrity impacts are none.
Technical Analysis
The root cause of this vulnerability is the lack of validation for the input length in the `shuffle` function, which can lead to integer overflow when length is multiplied by four. As a result, if the calculated length is less than or equal to zero, it can trigger exceptions during array manipulation. The required privileges are none, and user interaction is not necessary, making this vulnerability particularly concerning for unattended applications.
Risk & Impact Analysis
Organizations using Snappy-Java may face significant risks if this vulnerability is exploited, particularly in environments where the library is used for data processing. The potential for service disruption is high, as applications may crash unexpectedly. Addressing this vulnerability should be a priority, especially for organizations relying on Snappy-Java for critical functionality.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to 1.1.10.1 are affected by this vulnerability. Organizations should upgrade to version 1.1.10.1 or later to mitigate the risk.
Mitigation & Remediation
To remediate this vulnerability, organizations must update to version 1.1.10.1 or later of Snappy-Java. If immediate patching is not feasible, consider implementing workarounds such as input validation and error handling in applications that use the affected library. Additionally, monitoring application logs for exceptions related to array sizes may help identify potential exploitation attempts.
Organizations should validate remediation through penetration testing to identify similar weaknesses.
Detection Guidance
Monitor application logs for any instances of `java.lang.NegativeArraySizeException` or `java.lang.ArrayIndexOutOfBoundsException`, which may indicate exploitation attempts. Additionally, implementing behavioral monitoring for unusually high or low array sizes can help detect potential issues.
AppSecure Threat Intelligence Insight
This vulnerability highlights the importance of input validation and error handling in software design, particularly in libraries that handle data manipulation. Security teams should review their use of third-party libraries and ensure that proper validation mechanisms are in place to prevent similar vulnerabilities.
For comprehensive security testing, organizations can explore our application security assessment services to identify and remediate vulnerabilities effectively.
In conclusion, as organizations increasingly rely on third-party libraries, understanding and addressing vulnerabilities like CVE-2023-34453 is critical for maintaining robust application security.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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