ET EXPLOIT FortiOS SSL VPN - Pre-Auth Messages Payload Buffer Overflow (CVE-2018-13381)
Sourceet/open
CreatedAugust 14, 2019
UpdatedAugust 31, 2020
Classificationattempted-admin
alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT FortiOS SSL VPN - Pre-Auth Messages Payload Buffer Overflow (CVE-2018-13381)"; flow:established,to_server; http.request_body; content:"&msg=%26%23%3c"; fast_pattern; nocase; pcre:"/(?:\%3C){1000}/Ri"; http.start; content:"POST /message HTTP/1.1"; reference:cve,CVE-2018-13381; reference:url,blog.orange.tw/2019/08/attacking-ssl-vpn-part-2-breaking-the-fortigate-ssl-vpn.html; classtype:attempted-admin; sid:2027884; rev:3; metadata:affected_product Fortigate, attack_target Networking_Equipment, created_at 2019_08_14, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_08_31;)
References
Metadata
affected productFortigate
attack targetNetworking_Equipment
created at2019_08_14
deploymentSSLDecrypt
performance impactLow
confidenceHigh
signature severityMajor
updated at2020_08_31
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