CVE-2023-2868

CVE-2023-2868 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added May 26, 2023. EIP tracks 4 public exploits from researchers including cfielding-r7, krmxd, cashapp323232, including a Metasploit module exploits/linux/smtp/barracuda_esg_tarfile_rce.

AI-analyzed exploit summary This repository contains a functional exploit for CVE-2023-2868, a command injection vulnerability in Barracuda Email Security Gateway (ESG). The PoC crafts a malicious tar file with a payload that spawns a reverse shell when processed by the vulnerable ESG appliance.

A remote command injection vulnerability exists in the Barracuda Email Security Gateway (appliance form factor only) product effecting versions 5.1.3.001-9.2.0.006. The vulnerability arises out of a failure to comprehensively sanitize the processing of .tar file (tape archives). The vulnerability stems from incomplete input validation of a user-supplied .tar file as it pertains to the names of the files contained within the archive. As a consequence, a remote attacker can specifically format these file names in a particular manner that will result in remotely executing a system command through Perl's qx operator with the privileges of the Email Security Gateway product. This issue was fixed as part of BNSF-36456 patch. This patch was automatically applied to all customer appliances.