Denial of service in FortiRecorder dhcpd deamon



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-42755
CWE-ID CWE-190
Exploitation vector Local network
Public exploit N/A
Vulnerable software
 FortiRecorder
Hardware solutions / Security hardware applicances

Vendor Fortinet, Inc

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Integer overflow

EUVDB-ID: #VU64930

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-42755

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to integer overflow within the dhcpd deamon. A remote non-authenticated attacker on the local network can send specially crafted traffic to the affected system, trigger an integer overflow and perform a denial of service (DoS) attack.


Mitigation

Install update from vendor's website.

Vulnerable software versions

FortiRecorder: 6.0.0 - 6.4.2

CPE2.3 External links

https://fortiguard.fortinet.com/psirt/FG-IR-21-155


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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