Cryptographic Implementation Flaw in FortiMail by Fortinet
CVE-2021-24020

7.5HIGH

Key Information:

Vendor
Fortinet
Status
Fortinet Fortimail
Vendor
CVE Published:
9 July 2021

Summary

A significant flaw exists in FortiMail versions 6.4.0 through 6.4.4 and 6.2.0 through 6.2.7 due to a missing cryptographic step in the hash digest algorithm implementation. This weakness can be exploited by an unauthenticated attacker to manipulate signed URLs by appending additional data. As a result, the attacker could bypass the intended signature verification process, leading to potential security breaches and unauthorized access.

Affected Version(s)

Fortinet FortiMail FortiMail 6.4.0 through 6.4.4, and 6.2.0 through 6.2.7

References

https://fortiguard.com/advisory/FG-IR-21-027
x_refsource_CONFIRM

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.