CVE-2020-27009

high
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Description

A vulnerability has been identified in Capital VSTAR (Versions including affected DNS modules), Nucleus NET (All versions < V5.2), Nucleus Source Code (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 write past the end of an allocated structure. An attacker with a privileged position in the network could leverage this vulnerability to execute code in the context of the current process or cause a denial-of-service condition.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-185699.pdf

https://us-cert.cisa.gov/ics/advisories/icsa-21-103-04

Details

Source: MITRE

Published: 2021-04-22

Updated: 2021-11-17

Type: CWE-823

Risk Information

CVSS v2

Base Score: 6.8

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 8.1

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

Impact Score: 5.9

Exploitability Score: 2.2

Severity: HIGH