TI-2019-07139 Aliases CVE-2019-9747 GHSA-6729-2hp6-xxx8

In tinysvcmdns through 2018-01-16, a maliciously crafted mDNS (Multicast DNS) packet…

LOW 36CWE-835Published 2019-03-13 · Updated 2024-09-16

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-835.

Summary

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."

Why it matters now

EPSS 0.0139 72nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:tinysvcmdns_project:tinysvcmdns::::::::	up to 2018-01-16	Vulnerable	Tinysvcmdns Project

cpe:2.3:a:tinysvcmdns_project:tinysvcmdns:*:*:*:*:*:*:*:* Versions up to 2018-01-16 Vulnerable ·Tinysvcmdns Project

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2019-9747
2026-10-03 Alias added: GHSA-6729-2hp6-xxx8

References

Exploit 1

https://bitbucket.org/geekman/tinysvcmdns/issues/11/denial-of-service-vulnerability-infinite

TI-2017-08881 Memory corruption in geekman Tinysvcmdns CVSS 3.0CRITICAL 10.0
TI-2019-07140 In tinysvcmdns through 2018-01-16, an mDNS server processing a crafted packet can perform… CVSS 3.0CRITICAL 9.1
TI-2017-08923 NULL pointer dereference in Talos Tinysvcmdns CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences