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CVE-2020-25110: AMNESIA:33 #62

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senier opened this issue Dec 23, 2020 · 0 comments
Open

CVE-2020-25110: AMNESIA:33 #62

senier opened this issue Dec 23, 2020 · 0 comments
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Denial of Service DNS Missing Length Check OSS Remote Code Execution

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@senier
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senier commented Dec 23, 2020 •
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Description

the length byte of a domain name in a DNS query/response is not checked and is used for internal memory operations.

Root cause

An issue was discovered in the DNS implementation in Ethernut in Nut/OS 5.1. The length byte of a domain name in a DNS query/response is not checked, and is used for internal memory operations. This may lead to successful Denial-of-Service, and possibly Remote Code Execution.

Software

Name

Nut/OS 5.1 (Ethernut)

Versions affected

5.1

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Denial of Service DNS Missing Length Check OSS Remote Code Execution
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@senier