CVE-2020-9399 — MEDIUM (5.5)

Q: What is CVE-2020-9399?

CVE-2020-9399 is a vulnerability with a CVSS score of 5.5 (MEDIUM). The Avast AV parsing engine allows virus-detection bypass via a crafted ZIP archive. This affects versions before 12 definitions 200114-0 of Antivirus Pro, Antivirus Pro Plus, and Antivirus for Linux.

Q: How severe is CVE-2020-9399?

CVE-2020-9399 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2020-9399?

Check the references section above for vendor advisories and patch information. Affected products include: Avast Antivirus For Linux, Avast Antivirus Pro, Avast Antivirus Pro Plus.

Vulnerability Description

The Avast AV parsing engine allows virus-detection bypass via a crafted ZIP archive. This affects versions before 12 definitions 200114-0 of Antivirus Pro, Antivirus Pro Plus, and Antivirus for Linux.

CVSS Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Avast	Antivirus For Linux	< 12.0
Avast	Antivirus Pro	< 12.0
Avast	Antivirus Pro Plus	< 12.0

Related Weaknesses (CWE)

CWE-436

References

https://blog.zoller.lu/p/tzo-23-2020-avast-generic-archive.htmlThird Party Advisory
https://seclists.org/fulldisclosure/2020/Feb/35Mailing ListThird Party Advisory
https://blog.zoller.lu/p/tzo-23-2020-avast-generic-archive.htmlThird Party Advisory
https://seclists.org/fulldisclosure/2020/Feb/35Mailing ListThird Party Advisory

FAQ

What is CVE-2020-9399?

CVE-2020-9399 is a vulnerability with a CVSS score of 5.5 (MEDIUM). The Avast AV parsing engine allows virus-detection bypass via a crafted ZIP archive. This affects versions before 12 definitions 200114-0 of Antivirus Pro, Antivirus Pro Plus, and Antivirus for Linux.

How severe is CVE-2020-9399?

CVE-2020-9399 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-9399?

Check the references section above for vendor advisories and patch information. Affected products include: Avast Antivirus For Linux, Avast Antivirus Pro, Avast Antivirus Pro Plus.