CVE-2021-42757 : 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 allo

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.

Published 2021-12-08 11:15:12

Updated 2024-01-18 15:48:06

Source Fortinet, Inc.

View at NVD, CVE.org

Vulnerability category: OverflowMemory Corruption

Exploit prediction scoring system (EPSS) score for CVE-2021-42757

EPSS FAQ

0.04%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 6 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-42757

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.6	MEDIUM	AV:L/AC:L/Au:N/C:P/I:P/A:P	3.9	6.4	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
6.7	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	0.8	5.9	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: High User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High
6.7	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	0.8	5.9	Fortinet, Inc.
Attack Vector: Local Attack Complexity: Low Privileges Required: High User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2021-42757

CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.

Assigned by: nvd@nist.gov (Primary)

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Assigned by: nvd@nist.gov (Primary)

Products affected by CVE-2021-42757

Fortinet » Fortios
Versions from including (>=) 7.0.0 and up to, including, (<=) 7.0.2
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortios
Versions from including (>=) 6.2.0 and up to, including, (<=) 6.2.9
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortios
Versions from including (>=) 6.4.0 and up to, including, (<=) 6.4.7
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortios
Versions from including (>=) 5.0.0 and up to, including, (<=) 6.0.13
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortimail
Versions from including (>=) 5.4.0 and up to, including, (<=) 6.2.7
cpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortimail
Versions from including (>=) 7.0.0 and up to, including, (<=) 7.0.2
cpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortimail
Versions from including (>=) 6.4.0 and up to, including, (<=) 6.4.6
cpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiweb
Versions from including (>=) 5.0.0 and up to, including, (<=) 6.3.16
cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiweb » Version: 6.4.0
cpe:2.3:a:fortinet:fortiweb:6.4.0:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiweb » Version: 6.4.1
cpe:2.3:a:fortinet:fortiweb:6.4.1:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiswitch
Versions from including (>=) 6.0.0 and up to, including, (<=) 6.4.9
cpe:2.3:o:fortinet:fortiswitch:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiswitch
Versions from including (>=) 7.0.0 and up to, including, (<=) 7.0.3
cpe:2.3:o:fortinet:fortiswitch:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiportal
Versions from including (>=) 5.0.0 and up to, including, (<=) 6.0.10
cpe:2.3:a:fortinet:fortiportal:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortimanager
Versions from including (>=) 6.0.0 and up to, including, (<=) 6.4.7
cpe:2.3:a:fortinet:fortimanager:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortimanager
Versions from including (>=) 7.0.0 and up to, including, (<=) 7.0.2
cpe:2.3:a:fortinet:fortimanager:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortianalyzer
Versions from including (>=) 6.0.0 and up to, including, (<=) 6.4.7
cpe:2.3:a:fortinet:fortianalyzer:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortianalyzer
Versions from including (>=) 7.0.0 and up to, including, (<=) 7.0.2
cpe:2.3:a:fortinet:fortianalyzer:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiproxy
Versions from including (>=) 1.0.0 and up to, including, (<=) 2.0.7
cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiproxy » Version: 7.0.0
cpe:2.3:a:fortinet:fortiproxy:7.0.0:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiproxy » Version: 7.0.1
cpe:2.3:a:fortinet:fortiproxy:7.0.1:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortirecorder Firmware
Versions from including (>=) 6.4.0 and up to, including, (<=) 6.4.2
cpe:2.3:o:fortinet:fortirecorder_firmware:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortirecorder Firmware
Versions from including (>=) 2.6.0 and up to, including, (<=) 6.0.10
cpe:2.3:o:fortinet:fortirecorder_firmware:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiadc
Versions from including (>=) 5.0.0 and up to, including, (<=) 6.1.5
cpe:2.3:a:fortinet:fortiadc:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiadc
Versions from including (>=) 6.2.0 and up to, including, (<=) 6.2.2
cpe:2.3:a:fortinet:fortiadc:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortivoice
Versions from including (>=) 6.0.0 and up to, including, (<=) 6.0.10
cpe:2.3:a:fortinet:fortivoice:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortivoice
Versions from including (>=) 6.4.0 and up to, including, (<=) 6.4.4
cpe:2.3:a:fortinet:fortivoice:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortios-6k7k
Versions up to, including, (<=) 6.2.8
cpe:2.3:a:fortinet:fortios-6k7k:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortios-6k7k » Version: 6.4.6
cpe:2.3:a:fortinet:fortios-6k7k:6.4.6:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortios-6k7k » Version: 6.4.2
cpe:2.3:a:fortinet:fortios-6k7k:6.4.2:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortindr
Versions from including (>=) 1.1.0 and up to, including, (<=) 1.5.2
cpe:2.3:a:fortinet:fortindr:*:*:*:*:*:*:*:*
Matching versions

Vulnerability Details : CVE-2021-42757

Exploit prediction scoring system (EPSS) score for CVE-2021-42757

CVSS scores for CVE-2021-42757

CWE ids for CVE-2021-42757

References for CVE-2021-42757

Products affected by CVE-2021-42757