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CVE-2025-23020

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Date: February 19, 2025

An issue was discovered in Kwik before 0.10.1. A hash collision vulnerability (in the hash table used to manage connections) allows remote attackers to cause a considerable CPU load on the server (a Hash DoS attack) by initiating connections with colliding Source Connection IDs (SCIDs).

Severity Score

Related Resources (6)

https://github.com/ptrd/kwik/commit/b0733d72bad76bc5d8df2f4a7792ebb2539ebdc8
https://github.com/ptrd/kwik/releases/tag/v0.10.1
https://github.com/ptrd/kwik
https://github.com/ncc-pbottine/QUIC-Hash-Dos-Advisory
https://nvd.nist.gov/vuln/detail/CVE-2025-23020
https://www.mend.io/vulnerability-database/CVE-2025-23020

Severity Score

Weakness Type (CWE)

Inefficient Algorithmic Complexity

CWE-407

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

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