VulnerabilityModified

CVE-2017-5566

MEDIUM 6.7EPSS 0.62%

Does this matter?

Lower severity and a low EPSS score (0.62%). Track it; it rarely justifies an emergency change on its own.

Description

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.

CVSS 3.0: 6.7 MEDIUMCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.62% probability · 48th percentile
CISA KEV: Not listed
Weakness: CWE-427
Affected: avg/anti-virus · avg/internet security · avg/ultimate
Source: cve@mitre.org

References

http://cybellum.com/doubleagent-taking-full-control-antivirus/Third Party Advisory
http://cybellum.com/doubleagentzero-day-code-injection-and-persistence-technique/Technical Description, Third Party Advisory
http://www.securityfocus.com/bid/97022Third Party Advisory, VDB Entry
http://cybellum.com/doubleagent-taking-full-control-antivirus/Third Party Advisory
http://cybellum.com/doubleagentzero-day-code-injection-and-persistence-technique/Technical Description, Third Party Advisory
http://www.securityfocus.com/bid/97022Third Party Advisory, VDB Entry

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.