How severe is CVE-2021-20235?

This vulnerability has a severity rating of HIGH with a CVSS score of 8.1 out of 10.

What type of vulnerability is CVE-2021-20235?

This is classified as CWE-120, which is a common weakness in software security.

CVE-2021-20235

HIGH Year: 2021

CVSS v3 Score

8.1

High

CVSS v2 Score

6.8

Medium

Weakness Type

CWE-120

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Vulnerability Description

There's a flaw in the zeromq server in versions before 4.3.3 in src/decoder_allocators.hpp. The decoder static allocator could have its sized changed, but the buffer would remain the same as it is a static buffer. A remote, unauthenticated attacker who sends a crafted request to the zeromq server could trigger a buffer overflow WRITE of arbitrary data if CURVE/ZAP authentication is not enabled. The greatest impact of this flaw is to application availability, data integrity, and confidentiality.

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CVSS:8.1(High)

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