""ET EXPLOIT Windows HTTP Protocol Stack UAF/RCE (CVE-2021-31166), http.sys DOS (CVE-2022-21907) Inbound""
SID: 2032962
Revision: 1
Class Type: attempted-admin
Metadata: attack_target Server, created_at 2021_05_17, cve CVE_2021_31166, deployment Perimeter, deployment Internal, signature_severity Major, tag Exploit, updated_at 2021_05_17, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application
Reference:
-
cve
-
2021-31166
Protocol: tcp
Source Network: any
Source Port: any
Destination Network: [$HOME_NET,$HTTP_SERVERS]
Destination Port: any
Flow: established,to_server
Contents:
- Value: ",|20|,"
Within:
PCRE: "/^Accept-Encoding\x3a\x20[^\r\n]+,\x20,/Hmi"
Special Options:
-
fast_pattern
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http_header