Fortiadc
CVE-2021-42757
MEDIUM
Severity by source
AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionNVD
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.
AnalysisAI
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. Rated medium severity (CVSS 6.7), this vulnerability is low attack complexity. No vendor patch available.
Technical ContextAI
This vulnerability is classified as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. 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. Affected products include: Fortinet Fortiadc, Fortinet Fortianalyzer, Fortinet Fortimail, Fortinet Fortimanager, Fortinet Fortindr. Version information: before 6.4.7.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.
An improper handling of malformed request vulnerability [CWE-228] exists in FortiADC 5.0 all versions, 6.0.0 all version
A permissive cross-domain policy with untrusted domains vulnerability in Fortinet FortiADC 7.1.0 - 7.1.1, FortiDDoS-F 6.
An improper access control vulnerability [CWE-284] in FortiADC automation feature 7.1.0 through 7.1.2, 7.0 all versions,
An improper neutralization of special elements used in an SQL Command ('SQL Injection') vulnerability in Fortinet FortiA
Multiple improper neutralization of special elements used in an SQL Command ('SQL Injection') vulnerabilities [CWE-89] i
An improper neutralization of special elements used in an OS Command ('OS Command Injection') vulnerability [CWE-78 ] in
An improper neutralization of special elements used in an OS command vulnerability [CWE-78] in FortiADC CLI 7.1.0, 7.0.0
Multiple improper neutralization of special elements used in an os command ('OS Command Injection') vulnerabilties [CWE-
An improper neutralization of special elements used in an OS command vulnerability [CWE-78] in FortiADC 7.2.0, 7.1.0 thr
A format string vulnerability [CWE-134] in the command line interpreter of FortiADC version 6.0.0 through 6.0.4, FortiAD
FortiADC versions 6.1 through 7.6.1 contain an OS command injection vulnerability (CWE-78) that allows authenticated att
A relative path traversal [CWE-23] in Fortinet FortiADC version 7.2.0 and before 7.1.1 allows a privileged attacker to d
Same weakness CWE-120 – Classic Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today