PT-2016-2591 · Microsoft · Windows Vista+7

Nabeel Ahmed · Published 2016-08-09 · Updated 2019-05-20 · CVE-2016-3237

Positive Technologies (AI Summary)

CVSS v2.0

9.3

High

Base vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Microsoft Windows Vista SP2 Microsoft Windows Server 2008 SP2 and R2 SP1 Microsoft Windows 7 SP1 Microsoft Windows 8.1 Microsoft Windows Server 2012 Gold and R2 Microsoft Windows RT 8.1 Microsoft Windows 10 Gold, 1511, and 1607

Description The issue allows man-in-the-middle attackers to bypass authentication via vectors related to a fallback to NTLM authentication during a domain account password change. This is due to insufficient access restrictions in the Windows operating system, which can be exploited by a remote attacker to bypass the authentication procedure by affecting the NTLM authentication system during a domain account password change.

Recommendations For Microsoft Windows Vista SP2, update to a newer version to mitigate the risk. For Microsoft Windows Server 2008 SP2 and R2 SP1, update to a newer version to mitigate the risk. For Microsoft Windows 7 SP1, update to a newer version to mitigate the risk. For Microsoft Windows 8.1, update to a newer version to mitigate the risk. For Microsoft Windows Server 2012 Gold and R2, update to a newer version to mitigate the risk. For Microsoft Windows RT 8.1, update to a newer version to mitigate the risk. For Microsoft Windows 10 Gold, 1511, and 1607, update to a newer version to mitigate the risk. As a temporary workaround, consider restricting access to the NTLM authentication system during domain account password changes until a patch is available.

Exploit

Fix

Weakness Enumeration

CWE-264

Related Identifiers

BDU:2016-01983

CVE-2016-3237

Affected Products

Windows

Windows 10

Windows 7

Windows 8.1

Windows Rt 8.1

Windows Server 2008

Windows Server 2012

Windows Vista

References · 10

• 🔥 https://exploit-db.com/exploits/40409 · Exploit
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2016-3237 · Vendor Advisory
• https://bdu.fstec.ru/vul/2016-01983 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-3237 · Security Note
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-101 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2016-3237 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2016-3237 · Security Note
• https://technet.microsoft.com/library/security/ms16-101 · Note
• http://securityfocus.com/bid/92290 · Note
• http://securitytracker.com/id/1036576 · Note