PatchTheCVECVE-2017-16100: dns-sync is a sync/blocking dns resolver
CVE-2017-16100 is a critical-severity flaw (CVSS 9.8) affecting dns-sync. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
dns-sync is a sync/blocking dns resolver. If untrusted user input is allowed into the resolve() method then command injection is possible.
Why this priority
- Critical severity
- EPSS top 8%: very likely to be exploited
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2017-16100?
dns-sync: upgrade to newer than 0.1.1. Exact commands for each OS are on this page.
Is CVE-2017-16100 being exploited?
CVE-2017-16100 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2017-16100 affect?
CVE-2017-16100 affects dns-sync. Severity is critical (CVSS 9.8). dns-sync is a sync/blocking dns resolver. If untrusted user input is allowed into the resolve() method then command injection is possible.
How urgent is CVE-2017-16100?
Priority 67/100. Critical severity; EPSS top 8%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action