CVE-2011-10020

HIGH EPSS 53.6%
Published Aug 20, 202510mo ago · Modified Jun 16, 20262w ago
8.7 CVSS 4.0
High
Find Similar
Published Aug 20, 2025 10mo ago
Last Modified Jun 16, 2026 2w ago

Description

Kaillera Server version 0.86 is vulnerable to a denial-of-service condition triggered by sending a malformed UDP packet after the initial handshake. Once a client sends a valid HELLO0.83 packet and receives a response, any subsequent malformed packet causes the server to crash and become unresponsive. This flaw stems from improper input validation in the server’s UDP packet handler, allowing unauthenticated remote attackers to disrupt service availability.

CVSS Details

Base Score
8.7
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
53.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-20 Improper Input Validation Validation

References 4

  • kaillera.com http://kaillera.com/
  • raw.githubusercontent.com https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/dos/windows/games/kaillera.rb
  • exploit-db.com https://www.exploit-db.com/exploits/17460
  • vulncheck.com https://www.vulncheck.com/advisories/kaillera-server-dos-via-malformed-udp-packet

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.