CVE-2018-13379KEV · OVERDUE

Fortinet FortiOS SSL VPN Path Traversal Vulnerability

Critical · published June 4, 2019

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 9.1. It is confirmed in active exploitation. It sits in the 100.0th percentile for exploit probability.

1634
days past CISA
deadline
CVSS v3.1
9.1
EPSS
100%
Percentile
100.0
In the wild
Confirmed
What it is

🚨 A sneaky path traversal flaw in Fortinet FortiOS might as well hand an attacker the keys to your server! One crafty request is all it takes to download sensitive system files. 🔥 Think of this vulnerability like a restaurant with a hidden door that leads directly to the kitchen — an unauthorized person can simply walk through it and access all the chef's secret recipes. It’s a critical breach that lets anyone peek into your most private files! An unauthenticated attacker exploiting this flaw could gain access to crucial system files, potentially exposing sensitive data or even compromising the entire server. Imagine a digital burglar rifling through your files, stealing passwords, configurations, and more, all because someone forgot to lock a door!

Put simply

Think of this vulnerability like a restaurant with a hidden door that leads directly to the kitchen — an unauthorized person can simply walk through it and access all the chef's secret recipes. It’s a critical breach that lets anyone peek into your most private files! This vulnerability occurs in Fortinet's SSL VPN web portal, allowing attackers to manipulate crafted HTTP requests to traverse directories and download files that should be off-limits. This improper limitation of pathname access can lead to severe data breaches.

What to do

An unauthenticated attacker exploiting this flaw could gain access to crucial system files, potentially exposing sensitive data or even compromising the entire server. Imagine a digital burglar rifling through your files, stealing passwords, configurations, and more, all because someone forgot to lock a door! Patch FortiOS immediately to version 6.0.5 or higher, 5.6.8, or 5.4.13, and ensure that your FortiProxy is updated to at least version 2.0.1. Conduct a thorough audit of your file access permissions while you're at it! You've got this! Secure your network today and enjoy peace of mind knowing you've locked down those digital doors! 🛡️

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.99999 · 100.0th percentile
Published
2019-06-04T20:18Z
KEV added
2021-11-03 · due 2022-05-03
EPSS history
Timeline
  • 03 NOV 00:00Z
    Added to CISA KEV — remediate by May 3
    kev
  • 04 JUN 20:18Z
    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…
    cvelistv5