Microsoft Windows Secondary Logon Service Privilege Escalation Vulnerability

Exploited · KEV 2022-03-03RansomwareMetasploit moduleCVE-2016-0099CWE-264

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

Edge rules

0/8

Our test

No exploit yet

CVSS

7.8

EPSS

37.0% Top 1%

Posts, 14d

Published

2016-03-09

The Secondary Logon Service in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold and 1511 does not properly process request handles, which allows local users to gain privileges via a crafted application, aka "Secondary Logon Elevation of Privilege Vulnerability."

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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AI · answers from this page

Ask about CVE-2016-0099: 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 low privileges and no user interaction, leading to full loss of confidentiality, integrity and availability.

Needs local accessAny user loginNo user actionWorks 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 requiredThe attacker needs an ordinary user account.
Low
User interactionNo one has to click or open anything; the attack works on its own.
None
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:L/UI:N/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

5 found

1 Metasploit4 Exploit-DB0 Scanner template0 GitHub PoCs

MetasploitMS16-032 Secondary Logon Handle Privilege Escalation2016-03-21 · exploit · rank Normal · has check
Exploit-DBMicrosoft Windows 7 < 10 / 2008 < 2012 (x86/x64) - Secondary Logon Handle Privilege Escalation (MS16-032) (Metasploit)2016-07-13 · local · windows · verified
Exploit-DBMicrosoft Windows 7 < 10 / 2008 < 2012 (x86/x64) - Local Privilege Escalation (MS16-032)2016-04-25 · local · windows · verified
Exploit-DBMicrosoft Windows 7 < 10 / 2008 < 2012 R2 (x86/x64) - Local Privilege Escalation (MS16-032) (PowerShell)2016-04-21 · local · windows · verified
Exploit-DBMicrosoft Windows 8.1/10 (x86) - Secondary Logon Standard Handles Missing Sanitization Privilege Escalation (MS16-032)2016-03-21 · local · windows_x86 · verified

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

Timeline

2016-03-09
CVE published
CVE List
2016-03-21
Metasploit module published
MS16-032 Secondary Logon Handle Privilege Escalation
2016-03-21
Exploit published on Exploit-DB
Microsoft Windows 8.1/10 (x86) - Secondary Logon Standard Handles Missing Sanitization Privilege Escalation (MS16-032)
2022-03-03
Added to CISA KEV
Confirmed exploitation in the wild