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A vulnerability has been identified in Nucleus 4 (All...

Critical severity Unreviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Aug 17, 2023

Package

No package listedSuggest a package

Affected versions

Unknown

Patched versions

Unknown

Description

A vulnerability has been identified in Nucleus 4 (All versions < V4.1.0), Nucleus NET (All versions), Nucleus RTOS (versions including affected DNS modules), Nucleus ReadyStart (All versions < V2017.02.3), Nucleus Source Code (versions including affected DNS modules), SIMOTICS CONNECT 400 (All versions < V0.5.0.0), VSTAR (versions including affected DNS modules). The DNS domain name record decompression functionality does not properly validate the pointer offset values. The parsing of malformed responses could result in a read access past the end of an allocated structure. An attacker with a privileged position in the network could leverage this vulnerability to cause a denial-of-service condition.

References

Published by the National Vulnerability Database Apr 22, 2021
Published to the GitHub Advisory Database May 24, 2022
Last updated Aug 17, 2023

Severity

Critical

EPSS score

0.288%
(69th percentile)

CVE ID

CVE-2020-27738

GHSA ID

GHSA-pqww-3mgv-r6mj

Source code

No known source code

Dependabot alerts are not supported on this advisory because it does not have a package from a supported ecosystem with an affected and fixed version.

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