Vulnerability Report

CVE-2017-5566

RCE

Title: Avg Internet Security RCE

RCE

Proof Of Concept

No public PoC currently indexed for CVE-2017-5566.

CWE Category CWE-427

Published Date Mar 21, 2017

Modified Date Jun 17, 2026

Exploit Status Not Found

Score 6.7 CVSS v3.0

Exploit Probability (EPSS)

0.62%

Vulnerability Summary

CVE-2017-5566: Code injection vulnerability in AVG Ultimate 17.1 (and earlier), AVG Internet Security 17.1 (and earlier), and AVG AntiVirus FREE 17.1 (and earlier) allows a local attacker to bypass a self-protection mechanism, inject arbitrary code, and take full control of any AVG 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.

Impacted Vendors

drweb 1

f-secure 2

avg 3

Reference Links

http://cybellum.com/doubleagent-taking-full-control-antivirus/ http://cybellum.com/doubleagentzero-day-code-injection-and-persistence-technique/ http://www.securityfocus.com/bid/97022 http://cybellum.com/doubleagent-taking-full-control-antivirus/ http://cybellum.com/doubleagentzero-day-code-injection-and-persistence-technique/ http://www.securityfocus.com/bid/97022

CVSS v3.0

Source Entity [email protected]

Severity MEDIUM

6.7

Attack Vector

LOCAL

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

Source Entity [email protected]

Severity HIGH

7.2

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:L/AC:L/Au:N/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns