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CVE-2021-20236: Out-of-bounds Write

May 28, 2021 (updated November 7, 2023)

A flaw was found in the ZeroMQ server This flaw allows a malicious client to cause a stack buffer overflow on the server by sending crafted topic subscription requests and then unsubscribing. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

References

  • bugzilla.redhat.com/show_bug.cgi?id=1921976
  • nvd.nist.gov/vuln/detail/CVE-2021-20236

Code Behaviors & Features

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Affected versions

All versions before 4.3.3

Fixed versions

  • 4.3.3

Solution

Upgrade to version 4.3.3 or above.

Impact 9.8 CRITICAL

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

Learn more about CVSS

Weakness

  • CWE-787: Out-of-bounds Write

Source file

conan/zeromq/CVE-2021-20236.yml

Spotted a mistake? Edit the file on GitLab.

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