Integer overflow in Fortinet Fortiswitch, Fortirecorder, Fortivoiceenterprise, Fortios, Fortiproxy
CVE-2021-42755
An integer overflow / wraparound vulnerability [CWE-190] in FortiSwitch 7.0.2 and below, 6.4.9 and below, 6.2.x, 6.0.x; FortiRecorder 6.4.2 and below, 6.0.10 and below; FortiOS 7.0.2 and below, 6.4.8 and below, 6.2.10 and below, 6.0.x; FortiProxy 7.0.0, 2.0.6 and below, 1.2.x, 1.1.x, 1.0.x; FortiVoiceEnterprise 6.4.3 and below, 6.0.10 and below dhcpd daemon may allow an unauthenticated and network adjacent attacker to crash the dhcpd deamon, resulting in potential denial of service.
Vulnerability class: Integer Overflow
EPSS: 0.004 (30.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Fortinet Fortiswitch, Fortirecorder, Fortivoiceenterprise, Fortios, Fortiproxy — versions FortiSwitch 7.0.2 and below, 6.4.9 and below, 6.2.x, 6.0.x; FortiRecorder 6.4.2 and below, 6.0.10 and below; FortiOS 7.0.2 and below, 6.4.8 and below, 6.2.10 and below, 6.0.x; FortiProxy 7.0.0, 2.0.6 and below, 1.2.x, 1.1.x, 1.0.x; FortiVoiceEnterprise 6.4.3 and below, 6.0.10 and below
- Fortinet Fortios — versions 5.4.0, 5.4.1, 5.4.2
- Fortinet Fortiproxy — versions 7.0.0
- Fortinet Fortirecorder_firmware — versions 6.0.0, 6.0.1, 6.0.2
- Fortinet Fortiswitch
- Fortinet Fortivoice — versions 5.3.0, 5.3.1, 5.3.2
Weakness classification (CWE)
References
- psirt@fortinet.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-42755?
- CVE-2021-42755 is a medium-severity vulnerability in Fortinet Fortiswitch, Fortirecorder, Fortivoiceenterprise, Fortios, Fortiproxy, classified under Integer Overflow or Wraparound. CVSS score: 4.3/10. Published 2022-07-18.
- How severe is CVE-2021-42755?
- Medium severity. CVSS v3 base score is 4.3 out of 10.