CVE-2019-9747

7.5 highEPSS 1.4%

High (7.5) in tinysvcmdns project tinysvcmdns. EPSS 1.4% chance of exploitation in the next 30 days.

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."

Severity

CVSS 3.0

7.5 high

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 1.4% chance of exploitation in the next 30 days; higher than 72% of CVEs (scores of 2026-10-31)
CWE: CWE-835
Published: 2019-03-13
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

tinysvcmdns_project:tinysvcmdns

References

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