CVE-2025-30194
Last modified
CVE-2025-30194 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. When DNSdist is configured to provide DoH via the nghttp2 provider, an attacker can cause a denial of service by crafting a DoH exchange that triggers an illegal memory access (double-free) and crash of DNSdist, causing a denial of service. The remedy is: upgrade to the patched 1.9.9 version. A workaround is to temporarily switch to the h2o provider until DNSdist has been upgraded to a fixed version. We would like to thank Charles Howes for bringing this issue to our attention.. EPSS estimates a 1.99% chance of exploitation in the next 30 days.
Description
When DNSdist is configured to provide DoH via the nghttp2 provider, an attacker can cause a denial of service by crafting a DoH exchange that triggers an illegal memory access (double-free) and crash of DNSdist, causing a denial of service. The remedy is: upgrade to the patched 1.9.9 version. A workaround is to temporarily switch to the h2o provider until DNSdist has been upgraded to a fixed version. We would like to thank Charles Howes for bringing this issue to our attention.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2025-30194?
How severe is CVE-2025-30194?
How do I fix CVE-2025-30194?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2025
- CVE-2025-30189When cache is enabled, some passdb/userdb drivers incorrectl…7.4
- CVE-2025-3019KNIME Business Hub is affected by several cross-site scripti…7.2
- CVE-2025-30190Malicious content at office documents can be used to inject …5.4
- CVE-2025-30191Malicious content from E-Mail can be used to perform a redre…5.4
- CVE-2025-30192An attacker spoofing answers to ECS enabled requests sent ou…7.5
- CVE-2025-30193In some circumstances, when DNSdist is configured to allow a…7.5
- CVE-2025-30195An attacker can publish a zone containing specific Resource …7.5
- CVE-2025-30196Jenkins AnchorChain Plugin 1.0 does not limit URL schemes fo…6.5
- CVE-2025-30197Jenkins Zoho QEngine Plugin 1.0.29.vfa_cc23396502 and earlie…3.1
- CVE-2025-30198ECOVACS robot vacuums and base stations communicate via an i…6.3
- CVE-2025-30199ECOVACS vacuum robot base stations do not validate firmware …7.5
- CVE-2025-3020An low privileged remote Attacker can execute arbitrary web …5.4
Are you affected by CVE-2025-30194?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST