Microsoft Ancillary Function Driver (afd.sys) Improper Input Validation Vulnerability

Exploited · KEV 2022-03-28Metasploit moduleCVE-2011-2005CWE-264

Exploited since 2022-03-28. No WAF vendor names it yet.

Edge rules

0/8

Our test

No exploit yet

CVSS

7.8

EPSS

31.8% Top 2%

Posts, 14d

Published

2011-10-12

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… More

Edge coverage

Claimed by vendors

CloudflareBefore feed historyOlder than its feed AWSBefore feed historyOlder than its feed Microsoft AzureNo public claimNot named Google CloudBefore feed historyOlder than its feed FastlyBefore feed historyOlder than its feed F5Before feed historyOlder than its feed AkamaiNo public sourceNo public changelog OWASP CRSBefore feed historyOlder than its feed

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Ask about CVE-2011-2005: who's covered, what to patch first, how vendors compare. I cite sources and won't help with attacks.

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Severity, decoded

CVSS 3.1

7.8High

High · 7.8 / 10

Exploitable with local access, with no privileges and user interaction, leading to full loss of confidentiality, integrity and availability.

Needs local accessNo login neededNeeds a user to actWorks reliablyFull compromise

How the score is built8 metrics

Attack vectorAn attacker needs local access, or must trick a user into opening something on the machine.
Local
Attack complexityNo special conditions are needed; the attack works reliably.
Low
Privileges requiredNo account or login is needed.
None
User interactionA user has to do something first, such as open a file or click a link.
Required
ScopeThe damage stays within the vulnerable component.
Unchanged
Confidentiality impactAn attacker can read all data the affected component holds, or the most sensitive parts of it.
High
Integrity impactAn attacker can change any data or files the affected component protects.
High
Availability impactAn attacker can take the component down completely or keep it from serving anyone.
High

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

CISA's assessmentSSVC, from the CVE record

ExploitationActive

Attackers are exploiting this in the wild.

AutomatableNo

At least one step needs hands-on work, which slows mass attacks.

Technical impactTotal

A successful attack gives full control over the affected software or all of its data.

Public exploits

3 found

1 Metasploit2 Exploit-DB0 Scanner template0 GitHub PoCs

MetasploitMS11-080 AfdJoinLeaf Privilege Escalation2011-11-30 · exploit · rank Average
Exploit-DBMicrosoft Windows - 'AfdJoinLeaf' Local Privilege Escalation (MS11-080) (Metasploit)2012-10-10 · local · windows · verified
Exploit-DBMicrosoft Windows XP/2003 - 'afd.sys' Local Privilege Escalation (MS11-080)2011-11-30 · local · windows · verified

Links are to third-party code: never run it outside an isolated lab.

Timeline

2011-10-12
CVE published
CVE List
2011-11-30
Metasploit module published
MS11-080 AfdJoinLeaf Privilege Escalation
2011-11-30
Exploit published on Exploit-DB
Microsoft Windows XP/2003 - 'afd.sys' Local Privilege Escalation (MS11-080)
2022-03-28
Added to CISA KEV
Confirmed exploitation in the wild