3.7 CVE-2025-30187

Enriched by CISA
 

In some circumstances, when DNSdist is configured to use the nghttp2 library to process incoming DNS over HTTPS queries, an attacker might be able to cause a denial of service by crafting a DoH exchange that triggers an unbounded I/O read loop, causing an unexpected consumption of CPU resources.
https://nvd.nist.gov/vuln/detail/CVE-2025-30187

Categories

CWE-835 : Loop with Unreachable Exit Condition ('Infinite Loop')
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.) Chain: an operating system does not properly process malformed Open Shortest Path First (OSPF) Type/Length/Value Identifiers (TLV) (CWE-703), which can cause the process to enter an infinite loop (CWE-835) A Python machine communication platform did not account for receiving a malformed packet with a null size, causing the receiving function to never update the message buffer and be caught in an infinite loop. Chain: off-by-one error (CWE-193) leads to infinite loop (CWE-835) using invalid hex-encoded characters. Chain: self-referential values in recursive definitions lead to infinite loop. NULL UDP packet is never cleared from a queue, leading to infinite loop. Chain: web browser crashes due to infinite loop - "badlooping logic [that relies on] floating point math [CWE-1339] to exitthe loop [CWE-835]" Floating point conversion routine cycles back and forth between two different values. Floating point conversion routine cycles back and forth between two different values. Chain: improperly clearing a pointer in a linked list leads to infinite loop. Chain: an integer overflow (CWE-190) in the image size calculation causes an infinite loop (CWE-835) which sequentially allocates buffers without limits (CWE-1325) until the stack is full. Chain: A denial of service may be caused by an uninitialized variable (CWE-457) allowing an infinite loop (CWE-835) resulting from a connection to an unresponsive server.

References


 

AFFECTED (from MITRE)

Vendor Product Versions
PowerDNS DNSdist
  • 1.9.0 < 1.9.11 [affected]
  • 2.0.0 < 2.0.1 [affected]
© 2022 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.

CPE

cpe start end

REMEDIATION


EXPLOITS

Exploit-db.com

id description date
No known exploits

POC Github

Url
No known exploits

Other Nist (github, ...)

Url
No known exploits

CAPEC

Common Attack Pattern Enumerations and Classifications

id description severity
No entry