""ET WEB_CLIENT Spectre Kernel Memory Leakage JavaScript (POC Based)""

SID: 2025184

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, 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:

  • Value: "<script"

  • Value: "|3c 20|simpleByteArray.length|29|"

  • Value: "simpleByteArray|5b|"

  • Value: "|2a 20|TABLE1_STRIDE|29 7c 30 29 20 26 20 28|TABLE1_BYTES-1|29|"

  • Value: "|5e 3d 20|probeTable|5b|"

  • Value: "|7c 30 5d 7c 30 3b|"

Within: 50

PCRE:

Special Options:

  • file_data

  • fast_pattern

source