CVEvulnerability

CVE-2023-27997

9.8 CRITICAL Known exploited Published 2023-06-13 Modified 2026-07-31 Official page ↗

CISA Known Exploited Vulnerability

Fortinet FortiOS and FortiProxy SSL-VPN Heap-Based Buffer Overflow Vulnerability — Fortinet FortiOS and FortiProxy SSL-VPN

Fortinet FortiOS and FortiProxy SSL-VPN contain a heap-based buffer overflow vulnerability which can allow an unauthenticated, remote attacker to execute code or commands via specifically crafted requests.

Added to KEV: 2023-06-13
Remediation due: 2023-07-04
Ransomware use: Known
Required action: Apply updates per vendor instructions.
Notes: https://www.fortiguard.com/psirt/FG-IR-23-097; https://nvd.nist.gov/vuln/detail/CVE-2023-27997

Status: Analyzed
Published: 2023-06-13
Last modified: 2026-07-31
Assigner: [email protected]
CVSS 3.1 ([email protected]): 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 ([email protected]): 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses: CWE-122, CWE-787

Description

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.

Affected configurations

• fortinet fortiproxy (>= 1.1.0 <= 1.1.6) • fortinet fortiproxy (>= 1.2.0 <= 1.2.13) • fortinet fortiproxy (>= 2.0.0 <= 2.0.12) • fortinet fortiproxy (>= 7.0.0 <= 7.0.9) • fortinet fortiproxy (>= 7.2.0 <= 7.2.3) • fortinet fortios (>= 6.0.0 <= 6.0.16) • fortinet fortios (>= 6.2.0 <= 6.2.13) • fortinet fortios (>= 6.4.0 <= 6.4.12) • fortinet fortios (>= 7.0.0 <= 7.0.11) • fortinet fortios (>= 7.2.0 <= 7.2.4) • fortinet fortios (>= 6.0.12 <= 6.0.16) • fortinet fortios (>= 6.2.9 <= 6.2.13) • fortinet fortios 6.0.10 • fortinet fortios 6.2.4 • fortinet fortios 6.2.6 • fortinet fortios 6.2.7 • fortinet fortios 6.4.2 • fortinet fortios 6.4.6 • fortinet fortios 6.4.8 • fortinet fortios 6.4.10 • fortinet fortios 6.4.12 • fortinet fortios 7.0.5 • fortinet fortios 7.0.10

Weakness · CWE (2)

CWE-122 Heap-based Buffer Overflow weakness
CWE-787 Out-of-bounds Write weakness

References