Vulnerability Name:

CVE-2020-9399 (CCN-177031)

Assigned:2020-02-25
Published:2020-02-25
Updated:2021-07-21
Summary: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 v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)
4.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
5.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)
4.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-863
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2020-9399

Source: MISC
Type: Third Party Advisory
https://blog.zoller.lu/p/tzo-23-2020-avast-generic-archive.html

Source: XF
Type: UNKNOWN
avast-cve20209399-sec-bypass(177031)

Source: CCN
Type: Full-Disclosure Mailing List, Tue, 25 Feb 2020 22:24:22 +0100
[TZO-23-2020] - AVAST Generic Archive Bypass (ZIP)

Source: MISC
Type: Mailing List, Third Party Advisory
https://seclists.org/fulldisclosure/2020/Feb/35

Source: CCN
Type: Avast Web site
Avast Antivirus products

Vulnerable Configuration:Configuration 1:
  • cpe:/a:avast:antivirus_for_linux:*:*:*:*:*:*:*:* (Version < 12.0)
  • OR cpe:/a:avast:antivirus_pro:*:*:*:*:*:*:*:* (Version < 12.0)
  • OR cpe:/a:avast:antivirus_pro_plus:*:*:*:*:*:*:*:* (Version < 12.0)

    • * Denotes that component is vulnerable
    BACK
    avast antivirus for linux *
    avast antivirus pro *
    avast antivirus pro plus *