Actively exploited in the wild
Fortinet FortiOS and FortiProxy Out-of-bounds Write
Fortinet - FortiOS and FortiProxy · Listed in the CISA KEV since 2022-01-10. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2018-13383
MediumCVSS 4.3KEVSummary
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.
Risk Assessment
An attacker can cause the SSL VPN service to crash, denying access to logged-in users, leading to a denial of service.
Recommendation
Update Fortinet FortiOS and FortiProxy to the latest patched versions.
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Original NVD description (English source)
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.