Zero-day vulnerability in Windows

Improper input validation

On April 14, 2017 the Shadow Brokers team made the exploit pack publicly available. The exploits are believed to be stolen from the NSA.

It is unclear, which CVE has been assigned to this vulnerability. Possible CVEs: CVE-2017-0143, CVE-2017-0144, CVE-2017-0145, CVE-2017-0148.

On May 12, 2017 the malicious team has hit over 100,000 organizations in 150 countries. The hackers encrypted files from the target system and demanded 300-600$.

Known malware:

WannaCry (Wana Decryptor) malware (the hackers added .WCRY extention to the targte files). The malware is believed to be connected to Lazarus Group from North Korea.
EternalBlue exploit.

Vulnerability details

Advisory: SB2017031416 - Multiple vulnerabilities in Microsoft Windows SMB Server

Vulnerable component: Windows

CVE-ID: CVE-2017-0143

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-20 - Improper Input Validation


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to an error when parsing requests in Microsoft Server Message Block 1.0 (SMBv1) server. A remote unauthenticated attacker can send specially crafted SMB packets and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Public Exploits: