Fortinet FortiOS up to 6.0.4 SSL VPN Web Portal Message memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Fortinet FortiOS up to 6.0.4. This affects an unknown function of the component SSL VPN Web Portal. The manipulation as part of Message leads to memory corruption. This vulnerability is referenced as CVE-2018-13381. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Fortinet FortiOS up to 6.0.4 (Firewall Software). It has been rated as critical. This issue affects some unknown functionality of the component SSL VPN Web Portal. The manipulation as part of a Message leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is availability. The summary by CVE is:

A buffer overflow vulnerability in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.0 to 5.6.7, 5.4 and below versions under SSL VPN web portal allows a non-authenticated attacker to perform a Denial-of-service attack via special craft message payloads.

The weakness was published 05/17/2019 as FG-IR-18-387 as confirmed advisory (Website). It is possible to read the advisory at fortiguard.com. The identification of this vulnerability is CVE-2018-13381 since 07/06/2018. 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.

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.

Similar entries are available at VDB-135937, VDB-135936, VDB-135934 and VDB-135933. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 6.0

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

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 5.3
CNA Vector (Fortinet, Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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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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 🔍
05/17/2019 +315 days 🔍
05/17/2019 +0 days 🔍
06/05/2019 +19 days 🔍
09/26/2023 +1574 days 🔍

Sourcesinfo

Vendor: fortinet.com

Advisory: FG-IR-18-387
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-13381 (🔍)
GCVE (CVE): GCVE-0-2018-13381
GCVE (VulDB): GCVE-100-135935
SecurityFocus: 108440

See also: 🔍

Entryinfo

Created: 06/05/2019 07:15
Updated: 09/26/2023 23:43
Changes: 06/05/2019 07:15 (64), 06/19/2020 10:03 (1), 09/26/2023 23:43 (15)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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