Vulnerability identifier: #VU84794
Vulnerability risk: Critical
CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-749
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Email Security Gateway (ESG)
Server applications /
DLP, anti-spam, sniffers
Vendor: Barracuda Networks
Description
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to improper input validation within the third-party Perl library Spreadsheet::ParseExcel used to parse Excel files. A remote attacker can send a specially crafted email with a malicious file inside and execute arbitrary code on the device.
Note, the vulnerability is being actively exploited in the wild.
Mitigation
On December 22, 2023, Barracuda deployed a patch to remediate
compromised ESG appliances which exhibited indicators of compromise
related to the newly identified malware variants.
Vulnerable software versions
Email Security Gateway (ESG): 5.1.3 - 9.2.1.001
External links
http://www.barracuda.com/company/legal/esg-vulnerability
http://www.cve.org/CVERecord?id=CVE-2023-7101
http://metacpan.org/dist/Spreadsheet-ParseExcel
http://github.com/haile01/perl_spreadsheet_excel_rce_poc
http://github.com/jmcnamara/spreadsheet-parseexcel/blob/c7298592e102a375d43150cd002feed806557c15/lib/Spreadsheet/ParseExcel/Utility.pm#L171
http://github.com/mandiant/Vulnerability-Disclosures/blob/master/2023/MNDT-2023-0019.md
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.