VulnerabilityModified

CVE-2017-5567

MEDIUM 6.7EPSS 0.53%

Does this matter?

Lower severity and a low EPSS score (0.53%). Track it; it rarely justifies an emergency change on its own.

Description

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.

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: 0.53% probability · 44th percentile
CISA KEV: Not listed
Weakness: CWE-427
Affected: avast/free antivirus · avast/internet security · avast/premier · avast/pro antivirus
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/97017Third 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/97017Third Party Advisory, VDB Entry

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