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CVE-2023-27997

Quick assessment

Affected
Fortinet FortiOS-6K7K
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fortinet FortiOS是美国飞塔（Fortinet）公司的一套专用于FortiGate网络安全平台上的安全操作系统。该系统为用户提供防火墙、防病毒、IPSec/SSLVPN、Web内容过滤和反垃圾邮件等多种安全功能。 Fortinet FortiOS存在安全漏洞，该漏洞源于基于堆的缓冲区溢出漏洞。

CVSS 9.2 · Critical KEV · Ransomware EPSS 85.69% · P100

Affected Version Matrix 22

VendorProduct Version RangeStatus
Fortinet FortiOS 7.2.0≤ 7.2.4 affected
7.0.0≤ 7.0.11 affected
6.4.0≤ 6.4.12 affected
6.2.0≤ 6.2.13 affected
6.0.0≤ 6.0.16 affected
Fortinet FortiOS-6K7K 7.0.10 affected
7.0.5 affected
6.4.12 affected
6.4.10 affected
6.4.8 affected
6.4.6 affected
6.4.2 affected
6.2.9≤ 6.2.13 affected
… +4 more rows
Fortinet FortiProxy 7.2.0≤ 7.2.3 affected
7.0.0≤ 7.0.9 affected
2.0.0≤ 2.0.12 affected
1.2.0≤ 1.2.13 affected
1.1.0≤ 1.1.6 affected
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I. Basic Information for CVE-2023-27997

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Fortinet FortiOS 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fortinet FortiOS是美国飞塔（Fortinet）公司的一套专用于FortiGate网络安全平台上的安全操作系统。该系统为用户提供防火墙、防病毒、IPSec/SSLVPN、Web内容过滤和反垃圾邮件等多种安全功能。 Fortinet FortiOS存在安全漏洞，该漏洞源于基于堆的缓冲区溢出漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Fortinet FortiOS-6K7K 7.0.10 -
Fortinet FortiProxy 7.2.0 ~ 7.2.3 -
Fortinet FortiOS 7.2.0 ~ 7.2.4 -

II. Public POCs for CVE-2023-27997

# POC Description Source Link Shenlong Link
1 cve-2023-27997 https://github.com/Pik-sec/cve-2023-27997 POC Details
2 POC FortiOS SSL-VPN buffer overflow vulnerability https://github.com/rio128128/CVE-2023-27997-POC POC Details
3 Safely detect whether a FortiGate SSL VPN instance is vulnerable to CVE-2023-27997 based on response timing https://github.com/BishopFox/CVE-2023-27997-check POC Details
4 None https://github.com/imbas007/CVE-2023-27997-Check POC Details
5 None https://github.com/puckiestyle/cve-2023-27997 POC Details
6 Search vulnerable FortiOS devices via Shodan (CVE-2023-27997) https://github.com/TechinsightsPro/ShodanFortiOS POC Details
7 xortigate-cve-2023-27997 https://github.com/lexfo/xortigate-cve-2023-27997 POC Details
8 None https://github.com/delsploit/CVE-2023-27997 POC Details
9 A short tutorial about how to find and verify FortiOS vulnerablility. https://github.com/awchjimmy/CVE-2023-27997-tutorial POC Details
10 Fortigate SSL VPN buffer overflow exploit https://github.com/node011/CVE-2023-27997-POC POC Details
11 FortiGate SSL-VPN CVE-2023-27997 Exploit PoC Script with ROP Chain https://github.com/onurkerembozkurt/fgt-cve-2023-27997-exploit POC Details
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III. Intelligence Information for CVE-2023-27997

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Vendor Advisories for CVE-2023-27997 (1)

Same Patch Batch · Fortinet · 2023-06-13 · 18 CVEs total

CVE-2022-42478 8.1 HIGH Fortinet FortiSIEM 安全漏洞
CVE-2023-26210 7.8 HIGH Fortinet FortiADC 操作系统命令注入漏洞
CVE-2022-41327 7.6 HIGH Fortinet FortiOS 安全漏洞
CVE-2023-22633 7.2 HIGH Fortinet FortiNAC 安全漏洞
CVE-2022-39946 7.2 HIGH Fortinet FortiNAC 安全漏洞
CVE-2022-33877 6.8 MEDIUM Fortinet FortiClient 安全漏洞
CVE-2022-43953 6.3 MEDIUM Fortinet FortiOS 格式化字符串错误漏洞
CVE-2023-22639 6.3 MEDIUM Fortinet FortiOS 缓冲区错误漏洞
CVE-2023-28000 6.3 MEDIUM Fortinet FortiADC 操作系统命令注入漏洞
CVE-2022-42474 6.2 MEDIUM 多款Fortinet产品 路径遍历漏洞
CVE-2022-43949 5.9 MEDIUM Fortinet FortiSIEM 加密问题漏洞
CVE-2023-33305 4.9 MEDIUM Fortinet FortiOS 安全漏洞
CVE-2023-29175 4.4 MEDIUM Fortinet FortiOS 信任管理问题漏洞
CVE-2023-25609 4.2 MEDIUM Fortinet FortiManager 代码问题漏洞
CVE-2023-29178 4.1 MEDIUM Fortinet FortiProxy 缓冲区错误漏洞
CVE-2023-26204 3.6 LOW Fortinet FortiSIEM 安全漏洞
CVE-2023-26207 3.3 LOW Fortinet FortiOS 日志信息泄露漏洞

IV. Related Vulnerabilities

Same vendor: Fortinet
Same weakness: CWE-122

V. Comments for CVE-2023-27997

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