CVE-2019-9747
Last modified
CVE-2019-9747 is a vulnerability of currently unknown severity. 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. EPSS estimates a 1.39% chance of exploitation in the next 30 days.
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."
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Tinysvcmdns Project | Tinysvcmdns | <= 2018-01-16 |
References
- https://bitbucket.org/geekman/tinysvcmdns/issues/11/denial-of-service-vulnerability-infiniteExploit, Third Party Advisory
- https://bitbucket.org/geekman/tinysvcmdns/issues/11/denial-of-service-vulnerability-infiniteExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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