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CVE-2020-24338: AMNESIA:33 #54

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

CVE-2020-24338: AMNESIA:33 #54

senier opened this issue Dec 23, 2020 · 0 comments
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DNS OSS Remote Code Execution

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@senier
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senier commented Dec 23, 2020 •
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Description

The function that parses domain names lacks bounds checks, allowing attackers to corrupt memory with crafted DNS packets.

Root cause

An issue was discovered in picoTCP through 1.7.0. The DNS domain name record decompression functionality in pico_dns_decompress_name() in pico_dns_common.c does not validate the compression pointer offset values with respect to the actual data present in a DNS response packet, causing out-of-bounds writes that lead to Denial-of-Service and Remote Code Execution.

Software

Name

picoTCP, picoTCP-NG

Versions affected

≤ 1.7.0

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DNS OSS Remote Code Execution
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@senier