{"id":"CVE-2023-34453","aliases":["GHSA-pqr6-cmr2-h8hf"],"url":"https://o3.security/vulnerability/CVE-2023-34453","summary":"snappy-java's Integer Overflow vulnerability in shuffle leads to DoS","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 a fatal error.\n\nThe function `shuffle(int[] input)` in the file `BitShuffle.java` receives an array of integers and applies a bit shuffle on it. It does so by multiplying the length by 4 and passing it to the natively compiled shuffle function. Since the length is not tested, the multiplication by four can cause an integer overflow and become a smaller value than the true size, or even zero or negative. In the case of a negative value, a `java.lang.NegativeArraySizeException` exception will raise, which can crash the program. In a case of a value that is zero or too small, the code that afterwards references the shuffled array will assume a bigger size of the array, which might cause exceptions such as `java.lang.ArrayIndexOutOfBoundsException`.\n\nThe same issue exists also when using the `shuffle` functions that receive a double, float, long and short, each using a different multiplier that may cause the same issue.\n\nVersion 1.1.10.1 contains a patch for this vulnerability.","published":"2023-06-15T16:12:34.119Z","modified":"2026-08-12T13:34:30.362262Z","cvss":{"score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":{"score":0.01707,"percentile":0.76011,"asOf":"2026-09-12"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Maven","name":"org.xerial.snappy:snappy-java","fixedVersion":"1.1.10.1"}],"fix":{"url":"https://github.com/xerial/snappy-java/commit/820e2e074c58748b41dbd547f4edba9e108ad905","label":"xerial/snappy-java@820e2e0"},"references":[{"type":"WEB","url":"https://github.com/xerial/snappy-java/blob/05c39b2ca9b5b7b39611529cc302d3d796329611/src/main/java/org/xerial/snappy/BitShuffle.java#L107"},{"type":"WEB","url":"https://github.com/xerial/snappy-java/blob/master/src/main/java/org/xerial/snappy/BitShuffle.java"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/34xxx/CVE-2023-34453.json"},{"type":"ADVISORY","url":"https://github.com/xerial/snappy-java/security/advisories/GHSA-pqr6-cmr2-h8hf"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-34453"},{"type":"FIX","url":"https://github.com/xerial/snappy-java/commit/820e2e074c58748b41dbd547f4edba9e108ad905"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T13:34:30.362262Z"}}