Buffer Overflow Vulnerability in Fortinet FortiOS TFTP Client Library
CVE-2021-42757

6.3MEDIUM

Key Information:

Vendor

Fortinet
Status
FortiOS
Fortiddos-f
Fortivoice
Fortiproxy
Vendor
CVE Published:
8 December 2021

What is CVE-2021-42757?

A vulnerable buffer overflow in the TFTP client library of Fortinet's FortiOS allows an authenticated local attacker to execute arbitrary code. This vulnerability affects versions prior to 6.4.7 and versions from 7.0.0 to 7.0.2. Attackers can exploit this issue by sending specially crafted command line arguments, potentially compromising system integrity and leading to unauthorized access. It is critical for users of the affected FortiOS versions to update to the latest releases and implement necessary security measures.

Affected Version(s)

FortiADC 6.2.0 <= 6.2.2

FortiADC 6.1.0 <= 6.1.5

FortiADC 6.0.0 <= 6.0.4

References

https://fortiguard.com/advisory/FG-IR-21-173

CVSS V3.1

Score:
6.3
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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