FortiOS Buffer Overflow Vulnerability Could Lead to Arbitrary Code Execution

CVE-2023-27997
9.2CRITICAL

Key Information

Vendor
Fortinet
Status
FortiOS-6k7k
Fortiproxy
FortiOS
Vendor
CVE Published:
13 June 2023

Badges

👾 Exploit Exists🔴 Public PoC📰 News Worthy

Summary

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.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2023-27997 as being exploited and is known by the CISA as enabling ransomware campaigns.

The CISA's recommendation is: Apply updates per vendor instructions.

Affected Version(s)

FortiOS-6K7K = 7.0.10

FortiOS-6K7K = 7.0.5

FortiOS-6K7K = 6.4.12

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2023-27997-check
Created by BishopFox

xortigate-cve-2023-27997
Created by lexfo

CVE-2023-27997-POC
Created by rio128128

News Articles

favicon imagewww.thestack.technology

Fortinet patches MORE pre-auth RCEs, with exploits reported. Ivanti also slips out a fresh VPN fix...

"Disable SSL VPN (disable webmode is NOT a valid workaround..."

9 months ago

favicon imageCSO Online

Fortinet urges patching N-day bug amid ongoing nation-state exploitation

The flaw has a critical severity rating with a CVSS score of 9.6 and allows a remote unauthenticated actor to execute arbitrary commands by specially crafted HTTP requests.

9 months ago

EPSS Score

9% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.2
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit exists.

  • Risk change from: 9.8 to: 9.2 - (CRITICAL)

  • First article discovered by CSO Online

  • Vulnerability published.

  • Vulnerability Reserved.

Collectors

NVD DatabaseMitre DatabaseCISA Database8 Proof of Concept(s)2 News Article(s)
.