CVE-2018-13383
Fortinet FortiOS and FortiProxy Out-of-bounds Write
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run FortiOS and FortiProxy, fix it now.
CISA required action: Apply updates per vendor instructions.
US federal civilian agencies must remediate by Jul 10, 2022.
Patch status
No official fix confirmed yet
Until a fix ships, follow the vendor's mitigations and CISA's required action, limit exposure of affected systems, and watch this record for a patch.
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.
Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.
Affected products
| Product | Vendor | Affected versions | Fixed in | Source |
|---|---|---|---|---|
| FortiGate / FortiOS | Fortinet | < 1.2.9; 2.0.0; >= 5.2.0, < 5.2.15; >= 5.4.0, < 5.4.13; >= 5.6.0, < 5.6.11; >= 6.0.0, < 6.0.5 | 1.2.9; 5.2.15; 5.4.13; 5.6.11; 6.0.5 | NVD |
| FortiOS and FortiProxy | Fortinet | — | — | KEV |
Sources: NVD = NIST National Vulnerability Database; KEV = CISA Known Exploited Vulnerabilities catalog.
Intelligence timeline
Developments from the last 30 days, newest first.
- CVSS scoredUpdateKEV
CVE-2018-13383 scored CVSS 6.5: Fortinet FortiOS and FortiProxy, Fortinet FortiOS and FortiProxy Out-of-bounds Write
CISA lists this as exploited in the wild and known to be used in ransomware campaigns. Unpatched FortiOS and FortiProxy systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
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Coverage
We have not published a story about this vulnerability yet.