Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2021-42757

Severity CVSS v4.0:
Pending analysis
Type:
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Publication date:
08/12/2021
Last modified:
16/10/2025

Description

A buffer overflow [CWE-121] in the TFTP client library of FortiOS before 6.4.7 and FortiOS 7.0.0 through 7.0.2, may allow an authenticated local attacker to achieve arbitrary code execution via specially crafted command line arguments.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.70 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
6.70
Severity 3.x
MEDIUM
Vector 2.0
AV:L/AC:L/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 4.60 MEDIUM
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0
4.60
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:fortinet:fortiadc:*:*:*:*:*:*:*:* 5.0.0 (including) 6.1.5 (including)
cpe:2.3:a:fortinet:fortiadc:*:*:*:*:*:*:*:* 6.2.0 (including) 6.2.2 (including)
cpe:2.3:a:fortinet:fortianalyzer:*:*:*:*:*:*:*:* 6.0.0 (including) 6.4.7 (including)
cpe:2.3:a:fortinet:fortianalyzer:*:*:*:*:*:*:*:* 7.0.0 (including) 7.0.2 (including)
cpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:* 5.4.0 (including) 6.2.7 (including)
cpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:* 6.4.0 (including) 6.4.6 (including)
cpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:* 7.0.0 (including) 7.0.2 (including)
cpe:2.3:a:fortinet:fortimanager:*:*:*:*:*:*:*:* 6.0.0 (including) 6.4.7 (including)
cpe:2.3:a:fortinet:fortimanager:*:*:*:*:*:*:*:* 7.0.0 (including) 7.0.2 (including)
cpe:2.3:a:fortinet:fortindr:*:*:*:*:*:*:*:* 1.1.0 (including) 1.5.2 (including)
cpe:2.3:a:fortinet:fortios-6k7k:*:*:*:*:*:*:*:* 6.2.8 (including)
cpe:2.3:a:fortinet:fortios-6k7k:6.4.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortios-6k7k:6.4.6:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiportal:*:*:*:*:*:*:*:* 5.0.0 (including) 6.0.10 (including)
cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:* 1.0.0 (including) 2.0.7 (including)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools