Reachable Assertion in dnsdist - CVE-2024-25581

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Main Vulnerability Database Vulnerabilities #VU89380

Reachable Assertion in dnsdist - CVE-2024-25581

Published: May 13, 2024


Vulnerability identifier: #VU89380
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2024-25581
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion when incoming DNS over HTTPS support is enabled using the nghttp2 provider, and queries are routed to a tcp-only or DNS over TLS backend. A remote attacker can send a specially crafted request for a zone transfer (AXFR or IXFR) over DNS over HTTPS and perform a denial of service (DoS) attack.


Affected software

dnsdist
Fedora
dnsdist

How to mitigate CVE-2024-25581

Install updates from vendor's website.

dnsdist - update to 1.9.4
dnsdist - addressed in versions 1.9.7-1.fc39, 1.9.7-1.fc40, 1.9.7-1.fc41

External References

Related Security Bulletins