CVE-2023-2868
Improper Input Validation — is CVE-2023-2868real, exploitable, or a false positive? Here's the community ground truth.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
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.
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Field notes & remediation
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- 0
Barracuda Networks ESG Appliance Improper Input Validation Vulnerability — Barracuda Email Security Gateway (ESG) appliance contains an improper input validation vulnerability of a user-supplied .tar file, leading to remote command injection. Listed in the CISA KEV catalog (added 2023-05-26) — confirmed exploited in the wild, not theoretical. FIRST EPSS puts the chance of exploitation in the next 30 days at ~87%. Treat it as real and prioritize remediation over triage.
- 0
Required action for Barracuda Networks Email Security Gateway (ESG) Appliance: Apply updates per vendor instructions. CISA set a federal remediation due date of 2023-06-16. After patching, verify the vulnerable path is no longer reachable before closing the finding.
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