Authentication bypass via password reset feature in FortiPortal
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-36171 |
| CWE-ID | CWE-338 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
FortiPortal Server applications / IDS/IPS systems, Firewalls and proxy servers |
| Vendor | Fortinet, Inc |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
EUVDB-ID: #VU60934
Risk: High
CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-36171
CWE-ID:
CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain unauthorized access to the system.
the vulnerability exists due to weak pseudo-random number generator in the password reset feature. A remote attacker can predict parts of or the whole newly generated password within a given time frame and gain access to the system.
Install updates from vendor's website.
Vulnerable software versionsFortiPortal: 5.2.0 - 6.0.5
External linkshttp://fortiguard.com/psirt/FG-IR-21-099
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
