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.
7.0	$0-$5k	0.00

A vulnerability, which was classified as critical, has been found in Fortinet FortiOS up to 5.2.3 (Firewall Software). This issue affects an unknown part of the component FortiGuard Communication. The manipulation with an unknown input leads to a cryptographic issues vulnerability (SSL). Using CWE to declare the problem leads to CWE-310. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

FortiOS 5.0.x before 5.0.12 and 5.2.x before 5.2.4 supports anonymous, export, RC4, and possibly other weak ciphers when using TLS to connect to FortiGuard servers, which allows man-in-the-middle attackers to spoof TLS content by modifying packets.

The weakness was published 07/28/2015 with Citrix as FG-IR-15-021 as confirmed advisory (Website). It is possible to read the advisory at fortiguard.com. The identification of this vulnerability is CVE-2015-2323 since 03/18/2015. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 85911 (Fortinet FortiOS 5.0.x < 5.0.12 / 5.2.x < 5.2.4 Weak Ciphers (FG-IR-15-021)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Firewalls.

Upgrading to version 5.0.12 or 5.2.4 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (85911).

Productinfo

Type

• Firewall Software

Vendor

• Fortinet

Name

• FortiOS

Version

• 5.0.0
• 5.0.1
• 5.0.2
• 5.0.3
• 5.0.4
• 5.0.5
• 5.0.6
• 5.0.7
• 5.0.8
• 5.0.9
• 5.0.10
• 5.0.11
• 5.2.0
• 5.2.1
• 5.2.2
• 5.2.3

License

• commercial

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: SSL
Class: Cryptographic issues / SSL
CWE: CWE-310
CAPEC: 🔍
ATT&CK: 🔍

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

Nessus ID: 85911
Nessus Name: Fortinet FortiOS 5.0.x < 5.0.12 / 5.2.x < 5.2.4 Weak Ciphers (FG-IR-15-021)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: FortiOS 5.0.12/5.2.4

Timelineinfo

03/18/2015 🔍
07/24/2015 +128 days 🔍
07/24/2015 +0 days 🔍
07/28/2015 +4 days 🔍
07/28/2015 +0 days 🔍
07/29/2015 +1 days 🔍
08/11/2015 +13 days 🔍
09/22/2015 +42 days 🔍
06/07/2022 +2450 days 🔍

Sourcesinfo

Vendor: fortinet.com

Advisory: FG-IR-15-021
Organization: Citrix
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-2323 (🔍)
SecurityTracker: 1033092
Vulnerability Center: 52912 - Fortinet FortiOS 5.0 - 5.0.11, 5.2 - 5.2.3 Remote MitM Attack due to the Use of Weak Ciphers Suites, Medium
SecurityFocus: 76047 - Fortinet FortiOS CVE-2015-2323 Weak Cipher Security Bypass Weakness

Entryinfo

Created: 07/29/2015 17:57
Updated: 06/07/2022 07:13
Changes: 07/29/2015 17:57 (62), 03/07/2018 09:32 (11), 06/07/2022 07:13 (2)
Complete: 🔍

Discussion

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