""ET WEB_CLIENT Adobe Acrobat PDF Reader use after free JavaScript engine (CVE-2017-16393)""

SID: 2025091

Revision: 2

Class Type: attempted-user

Metadata: affected_product Adobe_Reader, attack_target Client_Endpoint, created_at 2017_11_14, cve CVE_2017_16393, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Web_Client_Attacks, updated_at 2018_07_06

Reference:

  • cve

  • 2017-16393

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: established,from_server

Contents:

  • Value: "this.addAnnot"

  • Value: "this.addField"

  • Value: ".popupRect"

  • Value: ".setAction("

  • Value: "OnFocus"

  • Value: "setFocus"

Within:

PCRE: "/\s+?(?P[^\s\x3d]+?)\s?=\s?this.addField.+?(?P=var2)\s\x2e\ssetAction\s?\x28\s?[\x22\x27]\s?OnFocus[^\x29]+popupOpen\s?=\s*?true/si"

Special Options:

  • file_data

  • nocase

  • nocase

  • nocase

  • nocase

  • nocase

  • nocase

source