Description
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."
References (1)
Core 1
Core References
Exploit, Third Party Advisory x_refsource_misc
https://bitbucket.org/geekman/tinysvcmdns/issues/11/denial-of-service-vulnerability-infinite
Scores
CVSS v3
7.5
EPSS
0.0043
EPSS Percentile
62.7%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-835
Status
published
Products (1)
tinysvcmdns_project/tinysvcmdns
< 2018-01-16
Published
Mar 13, 2019
Tracked Since
Feb 18, 2026