by Kastro
Paper/Archive/CVE-2021-24020

CVE-2021-24020

Fortinet Fortinet FortiMail — 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…

EPSS 0.6%CVSS 9.8
critical.is priorityof 100
39
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 49.5.495 × 209.9No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Fortinet FortiMailFortiMail 6.4.0 through 6.4.4, and 6.2.0 through 6.2.7–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
fortinet (CNA)7.5CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

reffortiguard.com/advisory/FG-IR-21-027