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."
Published 2016-03-09 11:59:10
Updated 2018-10-12 22:11:04
View at NVD,   CVE.org
Vulnerability category: Gain privilege

CVE-2016-0099 is in the CISA Known Exploited Vulnerabilities Catalog

This issue is known to have been leveraged as part of a ransomware campaign.
CISA vulnerability name:
Microsoft Windows Secondary Logon Service Privilege Escalation Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
A privilege escalation vulnerability exists in Microsoft Windows if the Windows Secondary Logon Service fails to properly manage request handles in memory. An attacker who successfully exploited this vulnerability could run arbitrary code as an administrator.
Added on 2022-03-03 Action due date 2022-03-24

Exploit prediction scoring system (EPSS) score for CVE-2016-0099

Probability of exploitation activity in the next 30 days: 0.04%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 8 % EPSS Score History EPSS FAQ

Metasploit modules for CVE-2016-0099

  • MS16-032 Secondary Logon Handle Privilege Escalation
    Disclosure Date: 2016-03-21
    First seen: 2020-04-26
    exploit/windows/local/ms16_032_secondary_logon_handle_privesc
    This module exploits the lack of sanitization of standard handles in Windows' Secondary Logon Service. The vulnerability is known to affect versions of Windows 7-10 and 2k8-2k12 32 and 64 bit. This module will only work against those versions of Windows with

CVSS scores for CVE-2016-0099

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
7.2
HIGH AV:L/AC:L/Au:N/C:C/I:C/A:C
3.9
10.0
NIST
7.8
HIGH CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1.8
5.9
NIST

CWE ids for CVE-2016-0099

  • Assigned by: nvd@nist.gov (Primary)

References for CVE-2016-0099

Products affected by CVE-2016-0099

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