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CVE-2020-11612: Allocation of Resources Without Limits or Throttling

June 15, 2020 (updated June 15, 2021)

The ZlibDecoders in Netty 4.1.x before 4.1.46 allow for unbounded memory allocation while decoding a ZlibEncoded byte stream. An attacker could send a large ZlibEncoded byte stream to the Netty server, forcing the server to allocate all of its free memory to a single decoder.

References

  • github.com/advisories/GHSA-mm9x-g8pc-w292
  • github.com/netty/netty/compare/netty-4.1.45.Final...netty-4.1.46.Final
  • github.com/netty/netty/issues/6168
  • github.com/netty/netty/pull/9924
  • lists.apache.org/thread.html/r14446ed58208cb6d97b6faa6ebf145f1cf2c70c0886c0c133f4d3b6f@%3Ccommits.druid.apache.org%3E
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  • lists.debian.org/debian-lts-announce/2020/09/msg00003.html
  • lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TS6VX7OMXPDJIU5LRGUAHRK6MENAVJ46/
  • nvd.nist.gov/vuln/detail/CVE-2020-11612
  • security.netapp.com/advisory/ntap-20201223-0001/
  • www.debian.org/security/2021/dsa-4885
  • www.oracle.com/security-alerts/cpuApr2021.html
  • www.oracle.com/security-alerts/cpujan2021.html

Code Behaviors & Features

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Affected versions

All versions starting from 4.1.0 before 4.1.46

Fixed versions

  • 4.1.46

Solution

Upgrade to version 4.1.46 or above.

Impact 7.5 HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Learn more about CVSS

Weakness

  • CWE-770: Allocation of Resources Without Limits or Throttling

Source file

maven/io.netty/netty-handler/CVE-2020-11612.yml

Spotted a mistake? Edit the file on GitLab.

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