Medium severity · published Dec 8, 2021
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 allow an authenticated local attacker to achieve arbitrary code…
6.7
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
FortiManager · Fortinet
6.0.0 through 6.4.7; 7.0.0 through 7.0.2 · source: NVD
FO
FortiOS · Fortinet
5.0.0 through 6.0.13; 6.2.0 through 6.2.9; 6.4.0 through 6.4.7; 7.0.0 through 7.0.2 · source: NVD
FO
Fortiadc · Fortinet
5.0.0 through 6.1.5; 6.2.0 through 6.2.2 · source: NVD
FO
Fortianalyzer · Fortinet
6.0.0 through 6.4.7; 7.0.0 through 7.0.2 · source: NVD
FO
Fortimail · Fortinet
5.4.0 through 6.2.7; 6.4.0 through 6.4.6; 7.0.0 through 7.0.2 · source: NVD
FO
Fortindr · Fortinet
1.1.0 through 1.5.2 · source: NVD
FO
Fortios-6k7k · Fortinet
through 6.2.8; 6.4.2; 6.4.6 · source: NVD
FO
Fortiportal · Fortinet
5.0.0 through 6.0.10 · source: NVD
FO
Fortiproxy · Fortinet
1.0.0 through 2.0.7; 7.0.0; 7.0.1 · source: NVD
FF
Fortirecorder Firmware · Fortinet
2.6.0 through 6.0.10; 6.4.0 through 6.4.2 · source: NVD
FO
Fortiswitch · Fortinet
6.0.0 through 6.4.9; 7.0.0 through 7.0.3 · source: NVD
FO
Fortivoice · Fortinet
6.0.0 through 6.0.10; 6.4.0 through 6.4.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-42757
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-42757
Vendor Advisory
https://fortiguard.com/advisory/FG-IR-21-173
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