Uncontrolled Recursion Affecting dnsdist package, versions [,1.9.10)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-DNSDIST-10185691
- published20 May 2025
- disclosed20 May 2025
- creditRenaud Allard
Introduced: 20 May 2025
CVE-2025-30193 (opens in a new tab)How to fix?
Upgrade dnsdist to version 1.9.10 or higher.
Overview
Affected versions of this package are vulnerable to Uncontrolled Recursion due to the configuration allowing an unlimited number of queries on a single incoming TCP connection. An attacker can cause a crash by crafting a TCP exchange that triggers an exhaustion of the stack.
Workaround
This vulnerability can be mitigated by restricting the maximum number of queries on incoming TCP connections to a safe value, like 50, via the setMaxTCPQueriesPerConnection setting.