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

SID: 2025427Rev: 10 viewsHistory

Sourceet/open

CreatedMarch 13, 2018

UpdatedJuly 26, 2019

Classificationattempted-admin

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;)

References

cve	2018-6789
url	devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/
url	github.com/ptresearch/AttackDetection/blob/master/CVE-2018-6789/cve-2018-6789.rules

Metadata

attack targetSMTP_Server

created at2018_03_13

cveCVE-2018-6789

deploymentPerimeter

performance impactModerate

confidenceMedium

signature severityMajor

tagCISA_KEV

updated at2019_07_26

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