Rule History

SID: 2034984 • Source: et/open

Versions (5)

Version DetailsCurrent

Rev: 1 • Jan 26, 2022, 12:00 PM

Message:

ET EXPLOIT SonicWall SMA Stack-Based Buffer Overflow CVE-2021-20038 M1

Rule:

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT SonicWall SMA Stack-Based Buffer Overflow CVE-2021-20038 M1"; flow:established,to_server; urilen:>400; threshold:type threshold, track by_src, count 10, seconds 30; http.request_line; content:"GET /%"; startswith; pcre:"/^[a-zA-Z0-9]{2}[%a-zA-Z0-9]{9}(?P<addr>(?:[%a-zA-Z0-9]{3}){4})(?P=addr)/R"; content:"%64%b8%06%08"; distance:0; within:55; fast_pattern; content:"?"; reference:cve,2021-20038; classtype:attempted-admin; sid:2034984; rev:1; metadata:attack_target Server, created_at 2022_01_26, cve CVE_2021_20038, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2022_01_26, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)

Created:

Jan 26, 2022, 12:00 PM

Updated:

Jan 26, 2022, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Sep 21, 2024, 3:00 AM

Filename:

rules/emerging-exploit.rules