""ET EXPLOIT Exim New-Line Injection into Spool Header File Inbound M1 (CVE-2020-28021)""
SID: 2032900
Revision: 2
Class Type: attempted-admin
Metadata: attack_target SMTP_Server, created_at 2021_05_04, cve CVE_2020_28021, deployment Perimeter, deployment Internal, signature_severity Major, updated_at 2021_05_04
Reference:
-
cve
-
2020-28021
Protocol: tcp
Source Network: any
Source Port: any
Destination Network: [$HOME_NET,$HTTP_SERVERS,$SMTP_SERVERS]
Destination Port: [25,26,587]
Flow: established,to_server
Contents:
-
Value: "MAIL|20|FROM"
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Value: "AUTH="
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Value: "+0A"
Within:
PCRE: "/^[^+]++0A/R"
Special Options:
- fast_pattern