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OpenAdvisories
Medium · 4.3 Known exploited · Ransomware CVE-2018-13383 EUVD-2018-5327GHSA-cjc8-2cq5-7jq7

A heap buffer overflow in Fortinet FortiOS 6.0.0 through 6.0.4, 5.6.0 through 5.6.10, 5.4.0 through 5.4.12, 5.2.14 and earlier and FortiPro…

Published May 29, 2019 · Updated Oct 21, 2025 · Assigned by fortinet

Vendor: Fortinet Product: Fortinet FortiOS and FortiProxy Category: Network devices

Description

A heap buffer overflow in Fortinet FortiOS 6.0.0 through 6.0.4, 5.6.0 through 5.6.10, 5.4.0 through 5.4.12, 5.2.14 and earlier and FortiProxy 2.0.0, 1.2.8 and earlier in the SSL VPN web portal may cause the SSL VPN web service termination for logged in users due to a failure to properly handle javascript href data when proxying webpages.

Affected products

VendorProductAffectedFixed
Fortinet Fortinet FortiOS and FortiProxy FortiOS 6.0.0 through 6.0.4, 5.6.0 through 5.6.10, 5.4.0 through 5.4.12, 5.2.14 and earlier, FortiProxy 2.0.0, 1.2.8 and earlier —

References