""ET WEB_CLIENT Spectre Kernel Memory Leakage JavaScript""
SID: 2025185
Revision: 4
Class Type: attempted-user
Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_01_04, cve CVE_2017_5753, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2018_02_06
Reference:
Protocol: tcp
Source Network: $EXTERNAL_NET
Source Port: $HTTP_PORTS
Destination Network: $HOME_NET
Destination Port: any
Flow: established,from_server
Contents:
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Value: "<script"
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Value: "<"
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Value: ".length"
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Value: "^="
Within:
PCRE: "/^\s[^\s]+\x5b\s?[^\x5d\x7c]+\x7c\s?0\s?\x5d\s?\x7c\s?0\s*?\x3b/Rsi"
Special Options:
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file_data
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nocase
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nocase
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fast_pattern