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

What is CVE-2021-24020?

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.

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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
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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

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