Improper input validation in Microsoft Windows and Windows Server - CVE-2018-0833

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an error within Microsoft Server Message Block 2.0 and 3.0 (SMBv2/SMBv3) client, when processing SMB requests. A remote attacker can make the vulnerable system to connect to a malicious SMB serverand perform a denial of service attack.

Affected software

How to mitigate CVE-2018-0833

Links to Public Exploits and PoC-codes

• Exploit #6417 - Microsoft Windows 8.1/2012 R2 - SMBv3 Null Pointer Dereference Denial of Service (June 17, 2021)
• Exploit #182 - CVE-in-Ruby (Exploits written & ported to Ruby - no Metasploit) (March 18, 2020)

External References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0833
• https://krbtgt.pw/smbv3-null-pointer-dereference-vulnerability/

Related Security Bulletins

• Denial of service in SMB client implementation in Microsoft Windows