CVE-2022-42475KEV · OVERDUECWE-197

Fortinet FortiOS Heap-Based Buffer Overflow Vulnerability

Critical · published January 2, 2023

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 9.3. It is confirmed in active exploitation. It sits in the 99.9th percentile for exploit probability.

1390
days past CISA
deadline
CVSS v3.1
9.3
EPSS
99%
Percentile
99.9
In the wild
Confirmed
What it is

🚨 A single crafted request is enough to trigger chaos! A heap-based buffer overflow in FortiOS and FortiProxy SSL-VPN means attackers could run arbitrary code without breaking a sweat. 🔥 Think of this vulnerability like a fast-food joint that accidentally put too much food in an order box, causing it to overflow and spill everywhere. If someone else is quick enough, they can grab whatever they want from inside without even paying! An attacker could exploit this vulnerability to execute any command they choose, potentially taking full control of the affected device. This could lead to unauthorized access to sensitive data, disruption of services, and the complete compromise of your network's security — absolutely devastating!

Put simply

Think of this vulnerability like a fast-food joint that accidentally put too much food in an order box, causing it to overflow and spill everywhere. If someone else is quick enough, they can grab whatever they want from inside without even paying! This heap-based buffer overflow allows remote unauthenticated attackers to craft requests that exploit the memory management inefficiencies in FortiOS SSL-VPN and FortiProxy SSL-VPN, leading to arbitrary code execution.

What to do

An attacker could exploit this vulnerability to execute any command they choose, potentially taking full control of the affected device. This could lead to unauthorized access to sensitive data, disruption of services, and the complete compromise of your network's security — absolutely devastating! Immediate action is crucial: update FortiOS to version 7.2.3 or later, and FortiProxy to 7.2.2 or later. Additionally, implement network segregation and monitor your logs for unusual activity while you patch. Don't delay — this is critical! You've got this! Patch those systems and secure your network, and you'll be a security hero in no time! 🛡️

The record
Technical detail
CVSS v3.1
9.3 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C
CVSS v4.0
Not supplied
EPSS
0.99474 · 99.9th percentile
Weakness
CWE-197 · Numeric Truncation Error
Published
2023-01-02T08:18Z
KEV added
2022-12-13 · due 2023-01-03
EPSS history
Timeline
  • 02 JAN 08:18Z
    A heap-based buffer overflow vulnerability [CWE-122] in FortiOS SSL-VPN 7.2.0 through 7.2.2, 7.0.0 through 7.0.8, 6.4.0 through 6.4.10, 6.2.0 through 6.2.11…
    cvelistv5
  • 13 DEC 00:00Z
    Added to CISA KEV — remediate by Jan 3
    kev