CVE-2018-13383
Out-of-bounds Write — is CVE-2018-13383real, exploitable, or a false positive? Here's the community ground truth.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
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.
References
Published
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Community ground truth
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Practitioners rate this higher than its CVSS — treat with extra caution.
Field notes & remediation
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- 0
Fortinet FortiOS and FortiProxy Out-of-bounds Write — A heap buffer overflow in Fortinet FortiOS and FortiProxy may cause the SSL VPN web service termination for logged in users. Listed in the CISA KEV catalog (added 2022-01-10) — confirmed exploited in the wild, not theoretical. It is linked to known ransomware campaigns. FIRST EPSS puts the chance of exploitation in the next 30 days at ~34%. Treat it as real and prioritize remediation over triage.
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Required action for Fortinet FortiOS and FortiProxy: Apply updates per vendor instructions. CISA set a federal remediation due date of 2022-07-10. After patching, verify the vulnerable path is no longer reachable before closing the finding.
Related CVEs
Same weakness — CWE-787 · Out-of-bounds Write.
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