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CVE-2011-0657

CRITICALCVSS 9.8/10EPSS 63.33%

Last modified

CVE-2011-0657 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.". EPSS estimates a 63.33% chance of exploitation in the next 30 days.

Description

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."

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
63.33%

99.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
MicrosoftWindows 2003 ServerAll versionsSp2
MicrosoftWindows 7All versions—
MicrosoftWindows Server 2003All versionsSp2
MicrosoftWindows Server 2008All versions—
MicrosoftWindows Server 2008r2—
MicrosoftWindows VistaAll versionsSp1
MicrosoftWindows XpAll versionsSp2

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2011-0657?
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."
How severe is CVE-2011-0657?
CVE-2011-0657 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 63.33% probability of exploitation in the next 30 days.
How do I fix CVE-2011-0657?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-0657?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST