Microsoft Windows SMBv3 Compression RCE (ADV200005)(CVE-2020-0796)(Remote)
critical Nessus Plugin ID 134421
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New! Plugin Severity Now Using CVSS v3
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Synopsis
The remote Windows host is using a vulnerable version of SMB.Description
A remote code execution vulnerability exists in Microsoft Server Message Block 3.1.1 (SMBv3) protocol due to how it handles a maliciously crafted compressed data packet. An unauthenticated, remote attacker can exploit this to bypass authentication and execute arbitrary commands.Note, the plugin checks if SMB 3.1.1 with compression is enabled. It does not currently verify the vulnerability itself.
Solution
Microsoft has provided additional details and guidance in the ADV200005 advisory.See Also
Plugin Details
Severity: Critical
ID: 134421
File Name: smb_microsoft_windows_adv200005_remote.nasl
Version: 1.7
Type: remote
Agent: windows
Family: Windows
Published: 3/11/2020
Updated: 9/3/2020
Dependencies: smb_dialects_enabled.nasl
Configuration: Enable paranoid mode
Risk Information
CVSS Score Source: CVE-2020-0796
VPR
Risk Factor: Critical
Score: 10
CVSS v2
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Temporal Vector: E:H/RL:OF/RC:C
CVSS v3
Risk Factor: Critical
Base Score: 10
Temporal Score: 9.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Temporal Vector: E:H/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:microsoft:windows
Required KB Items: SMB/smb_dialect/3.1.1, Settings/ParanoidReport
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 3/12/2020
Vulnerability Publication Date: 3/12/2020
Exploitable With
CANVAS (CANVAS)
Metasploit (SMBv3 Compression Buffer Overflow)
Reference Information
CVE: CVE-2020-0796