CVE-2021-24020
Last modified
CVE-2021-24020 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A missing cryptographic step in the implementation of the hash digest algorithm in FortiMail 6.4.0 through 6.4.4, and 6.2.0 through 6.2.7 may allow an unauthenticated attacker to tamper with signed URLs by appending further data which allows bypass of signature verification.. EPSS estimates a 0.62% chance of exploitation in the next 30 days.
Description
A missing cryptographic step in the implementation of the hash digest algorithm in FortiMail 6.4.0 through 6.4.4, and 6.2.0 through 6.2.7 may allow an unauthenticated attacker to tamper with signed URLs by appending further data which allows bypass of signature verification.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | Fortimail | >= 6.2.0, <= 6.2.7 |
| Fortinet | Fortimail | >= 6.4.0, < 6.4.5 |
References
- https://fortiguard.com/advisory/FG-IR-21-027Vendor Advisory
- https://fortiguard.com/advisory/FG-IR-21-027Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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