CVE-2018-13379

Fortinet FortiOS: SSL VPN Path Traversal

As of , CVE-2018-13379 in Fortinet FortiOS is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.

Exploited
Yes: CISA listed it on 3 November 2021
US federal deadline
3 May 2022181 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Known
EPSS score
0.99Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
EPSS when listed
Not availableCISA listed it before 4 February 2022, where the EPSS files we read begin.
Public exploit
1 Metasploit module and 2 Exploit-DB entries
Fix
No vendor link in CISA's entry

What CISA says to do

Apply updates per vendor instructions.

CISA's required action

What the flaw is

Fortinet FortiOS SSL VPN web portal contains a path traversal vulnerability that may allow an unauthenticated attacker to download FortiOS system files through specially crafted HTTP resource requests.

CISA's description

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 and 5.4.6 to 5.4.12 and FortiProxy 2.0.0, 1.2.0 to 1.2.8, 1.1.0 to 1.1.6, 1.0.0 to 1.0.7 under SSL VPN web portal allows an unauthenticated attacker to download system files via special crafted HTTP resource requests.

The CVE record's description, from fortinet

CVE published
4 June 2019
Assigned by
fortinet
CVSS
9.1 Critical (CVSS 3.1, from the CNA)
CWE-22
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CISA SSVC, exploitation
active
CISA SSVC, automatable
yes
CISA SSVC, technical impact
partial

Timeline

  1. The CVE record was published.
  2. Exploit-DB published an exploit (EDB-ID 47287).
  3. Exploit-DB published an exploit (EDB-ID 47288).
  4. CISA added it to its list of exploited vulnerabilities.
  5. The US federal deadline to fix it.

Public exploits

Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.

FortiOS: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2024-21762Out-of-Bound WriteFortinet FortiOSPatch this weekRansomware use; EPSS 0.830.83
CVE-2022-42475Heap-Based Buffer OverflowFortinet FortiOSPatch this weekRansomware use; EPSS 0.990.99
CVE-2020-12812SSL VPN Improper AuthenticationFortinet FortiOSPatch this weekRansomware use0.45
CVE-2019-5591Default ConfigurationFortinet FortiOSPatch this weekRansomware use0.18
CVE-2019-6693Use of Hard-Coded CredentialsFortinet FortiOSPatch this weekRansomware use0.06
CVE-2025-68686Exposure of Sensitive Information to an Unauthorized ActorFortinet FortiOSPatch soon0.30
CVE-2022-41328Path TraversalFortinet FortiOSPatch soon0.11
CVE-2021-44168Arbitrary File DownloadFortinet FortiOSPatch soon0.01

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