CVE-2023-34455: high-severity vulnerability in xerial snappy-java
snappy-java's unchecked chunk length leads to DoS
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 1.8%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
xerial · snappy-javaRelated CVEs — xerial snappy-java
In the same product, most dangerous first.
CVE-2023-34453MEDIUMsnappy-java's Integer Overflow vulnerability in shuffle leads to DoSEPSS 1.7%CVE-2023-34454MEDIUMsnappy-java's Integer Overflow vulnerability in compress leads to DoSEPSS 1.5%CVE-2023-43642HIGHMissing upper bound check on chunk length in snappy-java EPSS 1.2%CVE-2026-93452HIGHsnappy-java through 1.1.10.8 Buffer Overflow in Snappy.compressEPSS 0.7%CVE-2026-90559HIGHsnappy-java through 1.1.10.8 Out-of-Bounds Write via uncompressEPSS 0.6%CVE-2026-116590MEDIUMsnappy-java: JVM crash from unchecked ranges in Snappy.arrayCopy and SnappyOutputStream.rawWriteEPSS 0.4%
References
https://github.com/xerial/snappy-java/blob/05c39b2ca9b5b7b39611529cc302d3d796329611/src/main/java/org/xerial/snappy/SnappyInputStream.java#L388https://github.com/xerial/snappy-java/blob/master/src/main/java/org/xerial/snappy/SnappyInputStream.javahttps://github.com/xerial/snappy-java/commit/3bf67857fcf70d9eea56eed4af7c925671e8eaeahttps://github.com/xerial/snappy-java/security/advisories/GHSA-qcwq-55hx-v3vhhttps://security.netapp.com/advisory/ntap-20230818-0009/