CVE-2019-9747 Information

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.\

CVSS Vector

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

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5