CVE-2023-2868KEV · OVERDUECWE-20

Remote Code injection in Barracuda Email Security Gateway

Critical · published May 24, 2023

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 9.4. It is confirmed in active exploitation. It sits in the 99.7th percentile for exploit probability.

1227
days past CISA
deadline
CVSS v3.1
9.4
EPSS
87%
Percentile
99.7
In the wild
Confirmed
What it is

🚨 A single crafted .tar file can unleash a remote command execution nightmare on your Barracuda Email Security Gateway, and it’s already being exploited! 🔥 Think of it like a sneaky delivery person who knows just how to tweak the package labels to gain access to the server room — they get in without you ever knowing. That's how this vulnerability lets an attacker run commands on your system without breaking a sweat! An attacker could execute any command on the server with the same privileges as your Email Security Gateway, potentially leading to unauthorized data access, system manipulation, or even total takeover. This is not just a minor hiccup; it’s an absolute disaster waiting to happen!

Put simply

Think of it like a sneaky delivery person who knows just how to tweak the package labels to gain access to the server room — they get in without you ever knowing. That's how this vulnerability lets an attacker run commands on your system without breaking a sweat! This vulnerability arises from inadequate sanitization of user-supplied .tar file names, which allows an attacker to exploit the Perl 'qx' operator to remotely execute commands on the affected system.

What to do

An attacker could execute any command on the server with the same privileges as your Email Security Gateway, potentially leading to unauthorized data access, system manipulation, or even total takeover. This is not just a minor hiccup; it’s an absolute disaster waiting to happen! Immediately verify that you are running the patched version post-BNSF-36456, which should have been applied automatically. Ensure that any existing .tar files are sanitized properly before processing and consider auditing your email security configurations to prevent similar exploits in the future. You've got this! With the right steps, you can secure your system and keep those digital villains at bay! 🛡️

The record
Technical detail
CVSS v3.1
9.4 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.86841 · 99.7th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2023-05-24T18:00Z
KEV added
2023-05-26 · due 2023-06-16
EPSS history
Timeline
  • 26 MAY 00:00Z
    Added to CISA KEV — remediate by Jun 16
    kev
  • 24 MAY 18:00Z
    Remote Code injection in Barracuda Email Security Gateway
    cvelistv5