Fortinet FortiOS up to 6.0.4 SSL VPN Web Portal path traversal

CVSS Meta Temp Score
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CTI Interest Score
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8.0$0-$5k0.00

A vulnerability was found in Fortinet FortiOS up to 6.0.4 (Firewall Software). It has been classified as critical. This affects an unknown function of the component SSL VPN Web Portal. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality. The summary by CVE is:

An Improper Limitation of a Pathname to a Restricted Directory ("Path Traversal") in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.3 to 5.6.7 under SSL VPN web portal allows an unauthenticated attacker to download system files via special crafted HTTP resource requests.

The weakness was presented 05/24/2019 as FG-IR-18-384 as confirmed advisory (Website). The advisory is shared at fortiguard.com. This vulnerability is uniquely identified as CVE-2018-13379 since 07/06/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but an exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

It is declared as highly functional. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 11/03/2021 with a due date of 05/03/2022:

Apply updates per vendor instructions.

Upgrading to version 5.6.8, 6.0.5 or 6.2.0 eliminates this vulnerability. It is possible to mitigate the problem by applying the configuration setting config vpn ssl settings; unset source-interface; end. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.

See 135937, 135936, 135935 and 135934 for similar entries.

Productinfo

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Vendor

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 8.0

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 9.1
CNA Vector (Fortinet, Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-22
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Highly functional

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: FortiOS 5.6.8/6.0.5/6.2.0
Config: config vpn ssl settings; unset source-interface; end

Timelineinfo

07/06/2018 🔍
05/24/2019 +322 days 🔍
05/24/2019 +0 days 🔍
06/05/2019 +12 days 🔍
04/20/2024 +1781 days 🔍

Sourcesinfo

Vendor: fortinet.com

Advisory: FG-IR-18-384
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-13379 (🔍)
SecurityFocus: 108693

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 06/05/2019 07:11
Updated: 04/20/2024 14:49
Changes: 06/05/2019 07:11 (63), 06/19/2020 09:54 (1), 09/26/2023 23:21 (15), 04/20/2024 14:49 (25)
Complete: 🔍

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