""ET EXPLOIT Yealink RCE Attempt (CVE-2021-27561)""
SID: 2032095
Revision: 3
Class Type: attempted-admin
Metadata: attack_target IoT, created_at 2021_03_17, cve CVE_2021_27561_CVE_2021_27562, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2021_09_20
Reference:
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cve
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2021-27561
Protocol: tcp
Source Network: $EXTERNAL_NET
Source Port: any
Destination Network: $HOME_NET
Destination Port: $HTTP_PORTS
Flow: established,to_server
Contents:
- Value: "/premise/front/getPingData?url=http|3a 2f 2f|0.0.0.0|3a|9600/sm/api/v1/firewall/zone/services?zone=" Depth: 91
Within:
PCRE:
Special Options:
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fast_pattern
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http_uri