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CVE-2018-13379: Fortinet FortiOS SSL VPN Path Traversal Vulnerability

criticalknown exploitedpublic exploitCVE-2018-13379
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: Fortinetproduct: FortiOSPath traversal
What
A path traversal vulnerability may allow unauthenticated attackers to download system files.
Who is affected
Users of Fortinet FortiOS SSL VPN web portal.
Urgency
Immediate remediation is necessary due to active exploitation and critical severity.
Action
Apply the latest security updates for FortiOS.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2018-13379

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2018-13379coverage & exploitation statusNVD · CVE.org

Recent advisories for Fortinet FortiOS SSL

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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