DNSAPI.dll in the DNS client in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 does not properly process DNS queries, which allows remote attackers to execute arbitrary code via (1) a crafted LLMNR broadcast query or (2) a crafted application, aka "DNS Query Vulnerability."
Published 2011-04-13 18:55:01
Updated 2023-12-07 18:38:57
View at NVD,   CVE.org
Vulnerability category: Input validationExecute code

Exploit prediction scoring system (EPSS) score for CVE-2011-0657

Probability of exploitation activity in the next 30 days EPSS Score History
~ 98 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2011-0657

  • Microsoft Windows DNSAPI.dll LLMNR Buffer Underrun DoS
    Disclosure Date: 2011-04-12
    First seen: 2020-04-26
    This module exploits a buffer underrun vulnerability in Microsoft's DNSAPI.dll as distributed with Windows Vista and later without KB2509553. By sending a specially crafted LLMNR query, containing a leading '.' character, an attacker can trigger stack exhaustion or

CVSS scores for CVE-2011-0657

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen

CWE ids for CVE-2011-0657

  • The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2011-0657

Products affected by CVE-2011-0657

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