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Rewterz Threat Advisory – Multiple Fortinet Vulnerabilities

Severity

Medium

Analysis Summary

CVE-2021-36187

Fortinet FortiWeb is vulnerable to a denial of service, caused by an uncontrolled resource consumption flaw. By sending specially-crafted HTTP requests to proxy services, a remote attacker could exploit this vulnerability to cause a denial of service condition.

CVE-2021-36186

Fortinet FortiWeb is vulnerable to a stack-based buffer overflow, caused by improper bounds checking. By sending specially-crafted HTTP requests with large request parameter values, a remote attacker could overflow a buffer and execute arbitrary code on the system.

CVE-2021-36185

Fortinet FortiWLM could allow a remote authenticated attacker to execute arbitrary commands on the system, caused by a command injection flaw. By sending specially-crafted HTTP requests to various controllers, an attacker could exploit this vulnerability to execute arbitrary commands on the system.

CVE-2021-36184

Fortinet FortiWLM is vulnerable to SQL injection. A remote authenticated attacker could send specially-crafted SQL statements to various controllers, which could allow the attacker to view, add, modify or delete information in the back-end database.

Impact

  • Denial of Service
  • Buffer Overflow
  • Command Execution
  • Data Manipulation

Affected Vendors

Fortinet

Affected Products

  • Fortinet FortiWeb 6.2.5
  • Fortinet FortiWeb 6.3.15
  • Fortinet FortiWeb 6.4.0
  • Fortinet FortiWLM 8.6.1

Remediation

Refer to FortiGuard Advisory for patch, upgrade, or suggested workaround information.

CVE-2021-36187

https://www.fortiguard.com/psirt/FG-IR-21-039

CVE-2021-36186

https://www.fortiguard.com/psirt/FG-IR-21-119

CVE-2021-36185

https://www.fortiguard.com/psirt/FG-IR-21-110

CVE-2021-36184

https://www.fortiguard.com/psirt/FG-IR-21-107