ET EXPLOIT Exim New-Line Injection into Spool Header File Inbound - Information Disclosure Attempt (CVE-2020-28021) - Suricata Rule 2032902 (et/open)

ET EXPLOIT Exim New-Line Injection into Spool Header File Inbound - Information Disclosure Attempt (CVE-2020-28021)

SID: 2032902Rev: 10 viewsHistory

Sourceet/open

CreatedMay 4, 2021

UpdatedMay 4, 2021

Classificationattempted-admin

alert smtp any any -> [$HOME_NET,$HTTP_SERVERS,$SMTP_SERVERS] any (msg:"ET EXPLOIT Exim New-Line Injection into Spool Header File Inbound - Information Disclosure Attempt (CVE-2020-28021)"; flow:established,to_server; content:"MAIL|20|FROM"; content:"AUTH="; distance:0; pcre:"/^.{0,100}\+0A.{0,100}\x40/R"; content:"+0A"; fast_pattern; content:"|40|"; reference:url,www.qualys.com/2021/05/04/21nails/21nails.txt; reference:cve,2020-28021; classtype:attempted-admin; sid:2032902; rev:1; metadata:attack_target SMTP_Server, created_at 2021_05_04, cve CVE_2020_28021, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_05_04, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1082, mitre_technique_name System_Information_Discovery;)

References

url	www.qualys.com/2021/05/04/21nails/21nails.txt
cve	2020-28021

Metadata

attack targetSMTP_Server

created at2021_05_04

cveCVE-2020-28021

deploymentInternal

confidenceHigh

signature severityMajor

tagDescription_Generated_By_Proofpoint_Nexus

updated at2021_05_04

mitre tactic idTA0007

mitre tactic nameDiscovery

mitre technique idT1082

mitre technique nameSystem_Information_Discovery

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