CVE-2020-12820

Published: Dic 19, 2024 Last Modified: Gen 21, 2025 EU-VD ID: EUVD-2020-5103 Aliases: GSD-2020-12820
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 5,4
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: low
Availability: low

Description

AI Translation Available

Under non-default configuration, a stack-based buffer overflow in FortiOS version 6.0.10 and below, version 5.6.12 and below may allow a remote attacker authenticated to the SSL VPN to crash the FortiClient NAC daemon (fcnacd) and potentially execute arbitrary code via requesting a large FortiClient file name. We are not aware of proof of concept code successfully achieving the latter.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0065
Percentile
0,7th
Updated

EPSS Score Trend (Last 90 Days)

121

Stack-based Buffer Overflow

Draft
Abstraction: Variant Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Integrity Confidentiality Access Control Other
Potential Impacts:
Modify Memory Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Execute Unauthorized Code Or Commands Bypass Protection Mechanism Other
Applicable Platforms
Languages: C, C++, Memory-Unsafe
Likelihood of Exploit: High
View CWE Details
787

Out-of-bounds Write

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Availability Other
Potential Impacts:
Modify Memory Execute Unauthorized Code Or Commands Dos: Crash, Exit, Or Restart Unexpected State
Applicable Platforms
Languages: Assembly, C, C++, Memory-Unsafe
Technologies: ICS/OT
Likelihood of Exploit: High
View CWE Details
Operating System

Fortios by Fortinet

Product Information
Vendor Fortinet
Product Fortios
Version Range Affected
To 5.6.13 (exclusive)
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Fortios by Fortinet

Product Information
Vendor Fortinet
Product Fortios
Version Range Affected
From 6.0.0 (inclusive)
To 6.0.11 (exclusive)
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://fortiguard.fortinet.com/psirt/FG-IR-20-083
Vendor Advisory
https://fortiguard.fortinet.com/psirt/FG-IR-20-083