Risk Letters

Exploited vulnerability

CVE-2023-27997

TLP:CLEAR

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

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.

Facts

  • Vendor: Fortinet
  • Product: FortiOS and FortiProxy SSL-VPN
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 85.7 %
  • On CISA's Known Exploited Vulnerabilities list since: 13 June 2023
  • First known exploitation: 13 June 2023
  • Used in ransomware campaigns (per CISA): Yes
  • CISA's deadline for US federal agencies: 4 July 2023
  • Weakness: CWE-122
  • First seen by Risk Letters: 13 June 2023

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD