Fortinet FortiOS up to 5.2.3 FortiGuard Communication SSL cryptographic issue

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability has been found in Fortinet FortiOS up to 5.2.3 and classified as critical. Affected by this vulnerability is an unknown functionality of the component FortiGuard Communication. The manipulation leads to cryptographic issue (SSL). This vulnerability is referenced as CVE-2015-2323. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

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 issue 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 databases at Tenable (85911), SecurityFocus (BID 76047†), SecurityTracker (ID 1033092†) and Vulnerability Center (SBV-52912†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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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 (🔍)
GCVE (CVE): GCVE-0-2015-2323
GCVE (VulDB): GCVE-100-76835
SecurityFocus: 76047 - Fortinet FortiOS CVE-2015-2323 Weak Cipher Security Bypass Weakness
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

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: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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