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HIGH

CVE-2023-34453

CVSS v3

7.5

HIGH

EPSS Score

1.7 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • org.xerial.snappy:snappy-javaMavenall versions · fixed in 1.1.10.1

Vendor advisories

  • CVE-2023-34453 Red Hat Product Security1 product fixed · 8 known affected

    snappy-java: Integer overflow in shuffle leads to DoS

    snappy-java as a component of OpenShift Serverless · snappy-java-all as a component of Red Hat JBoss Fuse 6 · snappy-java-all-repolib as a component of Red Hat JBoss Fuse 6

  • RHSA-2023:7700 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat build of Quarkus 2.13.9 release and security update

  • RHSA-2023:5165 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat AMQ Streams 2.5.0 release and security update

Full record on NVD

Description

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. The 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`. The 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. Version 1.1.10.1 contains a patch for this vulnerability.

Technical details

Published
2023-06-15

Frequently asked questions

What is CVE-2023-34453?

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. The 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`. The 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. Version 1.1.10.1 contains a patch for this vulnerability.

Is CVE-2023-34453 actively exploited?

Active exploitation of CVE-2023-34453 has not been confirmed. Its EPSS score was 1.7% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-34453?

CVE-2023-34453 has a CVSS v3 base score of 7.5 (HIGH severity).

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