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      <title>GHSA-55g7-9cwv-5qfv — snappy-java's missing upper bound check on chunk length can lead to Denial of Service (DoS) impact</title>
      <link>https://db.gcve.eu/vuln/ghsa-55g7-9cwv-5qfv</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Maven: org.xerial.snappy:snappy-java&lt;/p&gt;
&lt;p&gt;### Summary&lt;/p&gt;
&lt;p&gt;snappy-java is a data compression library in Java. Its SnappyInputStream was found to be vulnerable to Denial of Service (DoS) attacks when decompressing data with a too-large chunk size. Due to missing upper bound check on chunk length, an unrecoverable fatal error can occur.&lt;/p&gt;
&lt;p&gt;### Scope&lt;/p&gt;
&lt;p&gt;All versions of snappy-java including the latest released version 1.1.10.3.  A fix is applied in 1.1.10.4&lt;/p&gt;
&lt;p&gt;### Details
While performing mitigation efforts related to [CVE-2023-34455](https://nvd.nist.gov/vuln/detail/CVE-2023-34455) in Confluent products, our Application Security team closely analyzed the fix that was accepted and merged into snappy-java version 1.1.10.1 in [this](https://github.com/xerial/snappy-java/commit/3bf67857fcf70d9eea56eed4af7c925671e8eaea) commit. The check on [line 421](https://github.com/xerial/snappy-java/commit/3bf67857fcf70d9eea56eed4af7c925671e8eaea#diff-c3e53610267092989965e8c7dd2d4417d355ff7f560f9e8075b365f32569079fR421) only attempts to check if chunkSize is not a negative value. We believe that this is an inadequate fix as it misses an upper-bounds check for overly positive values such as 0x7FFFFFFF (or (2,147,483,647 in decimal) before actually [attempting to allocate](https://github.com/xerial/snappy-java/commit/3bf67857fcf70d9eea56eed4af7c925671e8eaea#diff-c3e53610267092989965e8c7dd2d4417d355ff7f560f9e8075b365f32569079fR429) the provided unverified number of bytes via the “chunkSize” variable. This missing upper-bounds check can lead to t…&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Maven: org.xerial.snappy:snappy-java&lt;/p&gt;
&lt;p&gt;### Summary&lt;/p&gt;
&lt;p&gt;snappy-java is a data compression library in Java. Its SnappyInputStream was found to be vulnerable to Denial of Service (DoS) attacks when decompressing data with a too-large chunk size. Due to missing upper bound check on chunk length, an unrecoverable fatal error can occur.&lt;/p&gt;
&lt;p&gt;### Scope&lt;/p&gt;
&lt;p&gt;All versions of snappy-java including the latest released version 1.1.10.3.  A fix is applied in 1.1.10.4&lt;/p&gt;
&lt;p&gt;### Details
While performing mitigation efforts related to [CVE-2023-34455](https://nvd.nist.gov/vuln/detail/CVE-2023-34455) in Confluent products, our Application Security team closely analyzed the fix that was accepted and merged into snappy-java version 1.1.10.1 in [this](https://github.com/xerial/snappy-java/commit/3bf67857fcf70d9eea56eed4af7c925671e8eaea) commit. The check on [line 421](https://github.com/xerial/snappy-java/commit/3bf67857fcf70d9eea56eed4af7c925671e8eaea#diff-c3e53610267092989965e8c7dd2d4417d355ff7f560f9e8075b365f32569079fR421) only attempts to check if chunkSize is not a negative value. We believe that this is an inadequate fix as it misses an upper-bounds check for overly positive values such as 0x7FFFFFFF (or (2,147,483,647 in decimal) before actually [attempting to allocate](https://github.com/xerial/snappy-java/commit/3bf67857fcf70d9eea56eed4af7c925671e8eaea#diff-c3e53610267092989965e8c7dd2d4417d355ff7f560f9e8075b365f32569079fR429) the provided unverified number of bytes via the “chunkSize” variable. This missing upper-bounds check can lead to t…&lt;/p&gt;</content:encoded>
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