VDB-245176 · CVE-2023-36641 · FG-IR-23-151

Fortinet FortiProxy/FortiOS HTTP Request numeric truncation error

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.3	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Fortinet FortiProxy and FortiOS. This affects an unknown function of the component HTTP Request Handler. Executing a manipulation can lead to numeric truncation error. This vulnerability is handled as CVE-2023-36641. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Fortinet FortiProxy and FortiOS (Firewall Software) (affected version unknown). It has been declared as critical. This vulnerability affects an unknown functionality of the component HTTP Request Handler. The manipulation with an unknown input leads to a numeric truncation error vulnerability. The CWE definition for the vulnerability is CWE-197. Truncation errors occur when a primitive is cast to a primitive of a smaller size and data is lost in the conversion. As an impact it is known to affect availability. CVE summarizes:

A numeric truncation error in Fortinet FortiProxy version 7.2.0 through 7.2.4, FortiProxy version 7.0.0 through 7.0.10, FortiProxy 2.0 all versions, FortiProxy 1.2 all versions, FortiProxy 1.1, all versions, FortiProxy 1.0 all versions, FortiOS version 7.4.0, FortiOS version 7.2.0 through 7.2.5, FortiOS version 7.0.0 through 7.0.12, FortiOS 6.4 all versions, FortiOS 6.2 all versions, FortiOS 6.0 all versions allows attacker to denial of service via specifically crafted HTTP requests.

The weakness was released 11/14/2023 as FG-IR-23-151. The advisory is shared for download at fortiguard.com. This vulnerability was named CVE-2023-36641 since 06/25/2023. There are neither technical details nor an exploit publicly available.

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Productinfo

Type

Firewall Software

Vendor

Fortinet

Name

License

commercial

Website

Vendor: https://www.fortinet.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (Fortinet, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Numeric truncation error
CWE: CWE-197 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/25/2023 🔍
11/14/2023 +142 days 🔍
11/14/2023 +0 days 🔍
12/08/2023 +24 days 🔍

Sourcesinfo

Vendor: fortinet.com

Advisory: FG-IR-23-151
Status: Confirmed

CVE: CVE-2023-36641 (🔍)
GCVE (CVE): GCVE-0-2023-36641
GCVE (VulDB): GCVE-100-245176

Entryinfo

Created: 11/14/2023 19:16
Updated: 12/08/2023 13:23
Changes: 11/14/2023 19:16 (48), 12/08/2023 13:23 (1)
Complete: 🔍
Cache ID: 216::103