CVE-2017-5567

Severity Score

6.7

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Code injection vulnerability in Avast Premier 12.3 (and earlier), Internet Security 12.3 (and earlier), Pro Antivirus 12.3 (and earlier), and Free Antivirus 12.3 (and earlier) allows a local attacker to bypass a self-protection mechanism, inject arbitrary code, and take full control of any Avast process via a "DoubleAgent" attack. One perspective on this issue is that (1) these products do not use the Protected Processes feature, and therefore an attacker can enter an arbitrary Application Verifier Provider DLL under Image File Execution Options in the registry; (2) the self-protection mechanism is intended to block all local processes (regardless of privileges) from modifying Image File Execution Options for these products; and (3) this mechanism can be bypassed by an attacker who temporarily renames Image File Execution Options during the attack.

Vulnerabilidad de inyección de código en Avast Premier 12.3 ( y versiones anteriores), Internet Security 12.3 (y versiones anteriores), Pro Antivirus 12.3 (y versiones anteriores) y Free Antivirus 12.3 ( y versiones anteriores) permite a atacante local evitar un mecanismo de autoprotección, inyectar código arbitrario, y tomar el control total de cualquier proceso Avast process a través de un ataque "DoubleAgent". Una perspectiva de este problema es que (1) estos productos no utilizan la característica de procesos protegidos y, por lo tanto, un atacante puede introducir un proveedor verificador de aplicaciones DLL arbitrario bajo opciones de ejecución de archivo de imagen en el registro; (2) el mecanismo de autoprotección está destinado a bloquear todos los procesos locales (independientemente de los privilegios) de modificar las opciones de ejecución de archivos de imagen para estos productos; Y (3) este mecanismo puede ser anulado por un atacante que cambia temporalmente las opciones de ejecución de archivo de imagen durante el ataque.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-01-22 CVE Reserved
2017-03-21 CVE Published
2023-03-08 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-427: Uncontrolled Search Path Element

CAPEC

References (3)

URL	Tag	Source
http://cybellum.com/doubleagent-taking-full-control-antivirus	Third Party Advisory
http://cybellum.com/doubleagentzero-day-code-injection-and-persistence-technique	Technical Description
http://www.securityfocus.com/bid/97017	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Avast Search vendor "Avast"		Free Antivirus Search vendor "Avast" for product "Free Antivirus"				<= 12.3 Search vendor "Avast" for product "Free Antivirus" and version " <= 12.3"		-		Affected
Avast Search vendor "Avast"		Internet Security Search vendor "Avast" for product "Internet Security"				<= 12.3 Search vendor "Avast" for product "Internet Security" and version " <= 12.3"		-		Affected
Avast Search vendor "Avast"		Premier Search vendor "Avast" for product "Premier"				<= 12.3 Search vendor "Avast" for product "Premier" and version " <= 12.3"		-		Affected
Avast Search vendor "Avast"		Pro Antivirus Search vendor "Avast" for product "Pro Antivirus"				<= 12.3 Search vendor "Avast" for product "Pro Antivirus" and version " <= 12.3"		-		Affected