Multiple vulnerabilities in Microsoft Server Message Block (SMB)

Description

Multiple serious vulnerabilities have been found in Microsoft Server Message Block 1.0(SMBv1). Malicious users can exploit these vulnerabilities to execute arbitrary code or obtain sensitive information.

Below is a complete list of vulnerabilities:

1. An improper handling of certain requests can be exploited remotely by an unauthenticated attacker via specially designed packets to execute code on the target server;
2. An improper handling of certain requests can be exploited remotely by an unauthenticated attacker via specially designed packets to execute code to obtain sensitive information from the server.

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Technical details

Successful exploitation of these vulnerabilities can trigger WannaCry attack.

In case of WannaCry attack, EternalBlue modules are used to begin exploiting SMB vulnerabilities; if an attempt of exploit is successful, the DoblePulsar backdoor is used to install the malware.

Both SMBv1 and SMBv2 packets can be used in WannaCry attack, so disabling them can prevent the operational system from being infected. It is highly recommended to disable SMBv1, because this old protocol doesn’t have any significant impacts on modern operational systems. Disabling SMBv2 can cause serious problems.

For more details see Securelist article.

Users of Windows XP, Windows 8 and Windows server 2003 should read Customer Guidance for WannaCrypt attacks from Microsoft.

Note that Windows 10 and Windows Server 2016 are not affected by the WannaCry attack.

Original advisories

• Customer Guidance for WannaCrypt attacks

• Securelist
• MS17-010
• CVE-2017-0143
• CVE-2017-0144
• CVE-2017-0145
• CVE-2017-0146
• CVE-2017-0147
• CVE-2017-0148

Exploitation

This vulnerability can be exploited by the following malware:

https://threats.kaspersky.com/en/threat/Intrusion.Win.EternalRomance/

https://threats.kaspersky.com/en/threat/Intrusion.Win.CVE-2017-0147.sa.leak/

Public exploits exist for this vulnerability.

Related products

• Microsoft-Windows-Vista-4
• Microsoft-Windows-Server-2012
• Microsoft-Windows-8
• Microsoft-Windows-7
• Microsoft-Windows-Server-2008
• Microsoft-Windows-Server-2003
• Windows-RT
• Microsoft-Windows-XP
• Microsoft-Windows-10

CVE list

• CVE-2017-0143
  critical
• CVE-2017-0144
  critical
• CVE-2017-0145
  critical
• CVE-2017-0146
  critical
• CVE-2017-0147
  high
• CVE-2017-0148
  critical

KB list

• 4012217
• 4012215
• 4012216
• 4012606
• 4013198
• 4013429
• 4012212
• 4012214
• 4012213
• 4012598

Read more

Find out the statistics of the vulnerabilities spreading in your region on statistics.securelist.com