Detections
Analytics
Barracuda Email Security Gateway < 9.2.0.008 Command Injection (CVE-2023-2868)
critical Nessus Plugin ID 177587
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Synopsis
A web application running on the remote server is affected by a command injection vulnerability.Description
According to its self-reported version, the Barracuda Email Security Gateway on the remote web server is < 9.2.0.008.It is, therefore, affected by a command injection vulnerability in the processing of .tar files that could allow a remote, unauthenticated attacker to execute arbitrary commands with the privileges of the Email Security Gateway.
Barracuda released guidance on May 31, 2023 on the continued exploitation of this vulnerability on small number of already compromised ESG appliances. It urges to discontinue the use of the compromised ESG appliances and to contact Barracuda support to obtain a new ESG virtual or hardware appliance.
The FBI has independently verified that all exploited ESG appliances, even those with patches pushed out by Barracuda, remain at risk for continued computer network compromise from suspected PRC cyber actors exploiting this vulnerability.
It issued a flash alert on Aug 24, 2023 reinforcing Barracuda's warning where it strongly advises all affected ESG appliances to be isolated and replaced immediately, and all networks scanned for connections to the provided list of indicators of compromise.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to Barracuda Email Security Gateway 9.2.0.008 or later.See Also
https://www.barracuda.com/company/legal/esg-vulnerability
https://status.barracuda.com/incidents/34kx82j5n4q9
http://www.nessus.org/u?44bea323
Plugin Details
Severity: Critical
ID: 177587
File Name: barracuda_email_security_gateway_9_2_0_008.nasl
Version: 1.4
Type: remote
Family: CGI abuses
Published: 6/23/2023
Updated: 8/31/2023
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Critical
Score: 9.5
CVSS v2
Risk Factor: Critical
Base Score: 10
Temporal Score: 8.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2023-2868
CVSS v3
Risk Factor: Critical
Base Score: 9.8
Temporal Score: 9.4
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C
Vulnerability Information
CPE: x-cpe:/o:barracuda:email_security_gateway
Required KB Items: installed_sw/Barracuda Email Security Gateway
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 5/20/2023
Vulnerability Publication Date: 5/30/2023
CISA Known Exploited Vulnerability Due Dates: 6/16/2023
Reference Information
CVE: CVE-2023-2868