Home/CVE/The use of a cryptographically weak pseudo-random number generator in the password reset feature of FortiPortal before 6
CVE

CVE-2021-36171

The use of a cryptographically weak pseudo-random number generator in the password reset feature of FortiPortal before 6

The use of a cryptographically weak pseudo-random number generator in the password reset feature of FortiPortal before 6.0.6 may allow a remote unauthenticated attacker to predict parts of or the whole newly generated password within a given time frame.

HIGH · CVSS 8.1 EPSS 0.00484
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-338Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
▤

Affected Products & Versions

8
fortinet fortiportal<= 4.0.4
fortinet fortiportal>= 4.1.0 and <= 4.1.2
fortinet fortiportal>= 4.2.0 and <= 4.2.4
fortinet fortiportal>= 5.0.0 and <= 5.0.3
fortinet fortiportal>= 5.1.0 and <= 5.1.2
fortinet fortiportal>= 5.2.0 and < 5.2.7
fortinet fortiportal>= 5.3.0 and < 5.3.7
fortinet fortiportal>= 6.0.0 and < 6.0.6
▣

Scoring & Timeline

8.1
HIGH · CVSS v3.1 · psirt@fortinet.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD01 Mar 2022 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://fortiguard.com/psirt/FG-IR-21-099Vendor Advisory
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