VulnerabilityAnalyzed
CVE-2011-2005
Microsoft Ancillary Function Driver (afd.sys) Improper Input Validation Vulnerability
KEVHIGH 7.8EPSS 31.8%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 18 April 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
afd.sys in the Ancillary Function Driver in Microsoft Windows XP SP2 and SP3 and Server 2003 SP2 does not properly validate user-mode input passed to kernel mode, which allows local users to gain privileges via a crafted application, aka "Ancillary Function Driver Elevation of Privilege Vulnerability."
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 31.76% probability · 98th percentile
- CISA KEV
- Listed 28 March 2022 · due 18 April 2022
- Affected
- microsoft/windows server 2003 · microsoft/windows xp
- Source
- secure@microsoft.com
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2011-2005
References
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-080Patch, Vendor Advisory
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13114Broken Link
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-080Patch, Vendor Advisory
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13114Broken Link
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2011-2005US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.