EN

CVE-2023-27997

Critical
9.8
0.05.010.0
Year
2023
Published
Jun 13, 2023
Known Affected Devices
0
CVSS Score
9.8

What is CVE-2023-27997?

A heap-based buffer overflow vulnerability [CWE-122] in FortiOS version 7.2.4 and below, version 7.0.11 and below, version 6.4.12 and below, version 6.0.16 and below and FortiProxy version 7.2.3 and below, version 7.0.9 and below, version 2.0.12 and below, version 1.2 all versions, version 1.1 all versions SSL-VPN may allow a remote attacker to execute arbitrary code or commands via specifically crafted requests.

CVSS Vector Breakdown

CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV
Attack Vector
Network

Exploitable remotely over the network without requiring access to the local system.

AC
Attack Complexity
Low

No special conditions required. Exploit can be performed reliably and repeatedly.

PR
Privileges Required
None

No authentication required. Any anonymous user can exploit this vulnerability.

UI
User Interaction
None

No user interaction required. Exploit runs without any victim action.

S
Scope
Unchanged

Exploiting the vulnerability only affects the vulnerable component itself.

C
Confidentiality Impact
High

Complete loss of confidentiality. All data on the component may be exposed.

I
Integrity Impact
High

Complete loss of integrity. Attacker can modify any file or data on the component.

A
Availability Impact
High

Complete denial of service. The component becomes fully unavailable.

Known Affected Devices

Fortinet Fortinet FortiGate 40F Fortinet Fortinet FortiGate 60F Fortinet Fortinet FortiGate 60E Fortinet Fortinet FortiGate 61E Fortinet Fortinet FortiGate 70F Fortinet Fortinet FortiGate 80E Fortinet Fortinet FortiGate 80F Fortinet Fortinet FortiGate 81E Fortinet Fortinet FortiGate 81F Fortinet Fortinet FortiGate 100E Fortinet Fortinet FortiGate 100F Fortinet Fortinet FortiGate 101E Fortinet Fortinet FortiGate 101F Fortinet Fortinet FortiGate 200E Fortinet Fortinet FortiGate 200F Fortinet Fortinet FortiGate 201E Fortinet Fortinet FortiGate 201F Fortinet Fortinet FortiGate 300E Fortinet Fortinet FortiGate 301E Fortinet Fortinet FortiGate 400F Fortinet Fortinet FortiGate 401E Fortinet Fortinet FortiGate 401F Fortinet Fortinet FortiGate 500E Fortinet Fortinet FortiGate 501E Fortinet Fortinet FortiGate 600E Fortinet Fortinet FortiGate 601E Fortinet Fortinet FortiGate 900D Fortinet Fortinet FortiGate 1000D Fortinet Fortinet FortiGate 1100E Fortinet Fortinet FortiGate 1101E Fortinet Fortinet FortiGate 1800F Fortinet Fortinet FortiGate 2000E Fortinet Fortinet FortiGate 2200E Fortinet Fortinet FortiGate 2201E Fortinet Fortinet FortiGate 2500E Fortinet Fortinet FortiGate 3000D Fortinet Fortinet FortiGate 3100D Fortinet Fortinet FortiGate 3200D Fortinet Fortinet FortiGate 3400E Fortinet Fortinet FortiGate 3401E Fortinet Fortinet FortiGate 3600E Fortinet Fortinet FortiGate 3601E Fortinet Fortinet FortiGate 3960E Fortinet Fortinet FortiGate 4200F Fortinet Fortinet FortiGate 4201F Fortinet Fortinet FortiGate 4400F Fortinet Fortinet FortiGate 4401F Fortinet Fortinet FortiGate 6300F Fortinet Fortinet FortiGate 6301F Fortinet Fortinet FortiGate 6500F Fortinet Fortinet FortiGate 6501F Fortinet Fortinet FortiGate 7030E Fortinet Fortinet FortiGate 7040E Fortinet Fortinet FortiGate 7121F Fortinet Fortinet FortiGate VM01 Fortinet Fortinet FortiGate VM02 Fortinet Fortinet FortiGate VM04 Fortinet Fortinet FortiGate VM08

FAQ

How severe is CVE-2023-27997?

CVE-2023-27997 has a CVSS score of 9.8/10, rated as Critical. This is the highest severity level - immediate patching is strongly recommended.

What does the CVSS score mean for CVE-2023-27997?

CVSS (Common Vulnerability Scoring System) rates vulnerability severity from 0.0 to 10.0. CVE-2023-27997 scores 9.8/10 (Critical). Scores 9.0–10.0 are Critical, 7.0–8.9 are High, 4.0–6.9 are Medium, and below 4.0 are Low.

Which devices are affected by CVE-2023-27997?

The list of devices confirmed to be affected by CVE-2023-27997 is shown in the "Affected Devices" section above. Check your firmware version against the vendor security advisory and apply the latest patch.

How do I fix or mitigate CVE-2023-27997?

Apply the latest firmware or software update from the vendor. Check the References section above for official advisories and patch notes. If no patch is available, consider disabling the affected feature or isolating the device from untrusted networks.