What’s Vulnerable › Vulnerabilities

CVE-2019-9748

• Severity: critical (CVSS 9.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-03-13 · updated 2026-06-17
• Weakness: CWE-125

Description

In tinysvcmdns through 2018-01-16, an mDNS server processing a crafted packet can perform arbitrary data read operations up to 16383 bytes from the start of the buffer. This can lead to a segmentation fault in uncompress_nlabel in mdns.c and a crash of the server (depending on the memory protection of the CPU and the operating system), or disclosure of memory content via error messages or a server response. 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."

Affected products

• Talos Tinysvcmdns: through 2018-01-16

References

• https://bitbucket.org/geekman/tinysvcmdns/issues/10/arbitrary-memory-read-while-parsing
• https://bitbucket.org/geekman/tinysvcmdns/issues/10/arbitrary-memory-read-while-parsing

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