Vulnerability Details CVE-2019-9747
In tinysvcmdns through 2018-01-16, a maliciously crafted mDNS (Multicast DNS) packet triggers an infinite loop while parsing an mDNS query. When mDNS compressed labels point to each other, the function uncompress_nlabel goes into an infinite loop trying to analyze the packet with an mDNS query. As a result, the mDNS server hangs after receiving the malicious mDNS packet. NOTE: the product's web site states "This project is un-maintained, and has been since 2013. ... There are known vulnerabilities ... You are advised to NOT use this library for any new projects / products."
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 61.8%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 5.0
References
Products affected by CVE-2019-9747
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cpe:2.3:a:tinysvcmdns_project:tinysvcmdns:2016-07-18
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cpe:2.3:a:tinysvcmdns_project:tinysvcmdns:2017-11-05
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cpe:2.3:a:tinysvcmdns_project:tinysvcmdns:2018-01-16