Denial of service in FortiVoice 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 Subscribe |
FortiVoice Server applications / Conferencing, Collaboration and VoIP solutions |
| Vendor | Fortinet, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Integer overflow
EUVDB-ID: #VU64930
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-42755
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe 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 versionsFortiVoice: 6.0.0 - 6.4.3
External linkshttp://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.
