Rule History

SID: 2025427 • Source: et/open

Versions (5)

Version DetailsCurrent

Rev: 1 • Mar 13, 2018, 12:00 PM

Message:

ET EXPLOIT [PT Security] Exim <4.90.1 Base64 Overflow RCE (CVE-2018-6789)

Rule:

alert tcp any any -> $HOME_NET 25 (msg:"ET EXPLOIT [PT Security] Exim <4.90.1 Base64 Overflow RCE (CVE-2018-6789)"; flow:established,to_server,only_stream; content:"|0D 0A|AUTH"; pcre:"/AUTH\s+\S+\s+(?:[a-zA-Z0-9\+\/=]{4})*+[a-zA-Z0-9\+\/=]{3}\s/"; reference:cve,2018-6789; reference:url,devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/; reference:url,github.com/ptresearch/AttackDetection/blob/master/CVE-2018-6789/cve-2018-6789.rules; classtype:attempted-admin; sid:2025427; rev:1; metadata:attack_target SMTP_Server, created_at 2018_03_13, cve CVE_2018_6789, deployment Perimeter, performance_impact Moderate, confidence Medium, signature_severity Major, tag CISA_KEV, updated_at 2019_07_26;)

Created:

Mar 13, 2018, 12:00 PM

Updated:

Jul 26, 2019, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

May 30, 2025, 12:04 AM

Filename:

rules/emerging-exploit.rules