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CVE-2020-9320

MEDIUM
5.5
CVSS Score
Published: February 20, 2020 at 09:39 PM UTC
Updated: June 17, 2026 at 03:27 AM UTC
8 products affected across 1 vendorAvira Internet Security SuiteAvira PrimeAntivirus Server

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Severity
MEDIUM5.5
Exploit prediction
EPSS 3%

Description

Avira AV Engine before 8.3.54.138 allows virus-detection bypass via a crafted ISO archive. This affects versions before 8.3.54.138 of Antivirus for Endpoint, Antivirus for Small Business, Exchange Security (Gateway), Internet Security Suite for Windows, Prime, Free Security Suite for Windows, and Cross Platform Anti-malware SDK. NOTE: Vendor asserts that vulnerability does not exist in product

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Anti Malware SDK· Avira
95%
v < 8.3.54.138
Affected range stops below 8.3.54.138, so it looks safe — our inference, not a vendor statement
Antivirus Server· Avira
95%
v < 8.3.54.138
Affected range stops below 8.3.54.138, so it looks safe — our inference, not a vendor statement
Avira Antivirus for Endpoint· Avira
95%
v < 8.3.54.138
Affected range stops below 8.3.54.138, so it looks safe — our inference, not a vendor statement
Avira Antivirus for Small Business· Avira
95%
v < 8.3.54.138
Affected range stops below 8.3.54.138, so it looks safe — our inference, not a vendor statement
Avira Exchange Security· Avira
95%
v < 8.3.54.138
Affected range stops below 8.3.54.138, so it looks safe — our inference, not a vendor statement
Avira Free Security Suite· Avira
95%
v < 8.3.54.138
Affected range stops below 8.3.54.138, so it looks safe — our inference, not a vendor statement
Avira Internet Security Suite· Avira
95%
v < 8.3.54.138
Affected range stops below 8.3.54.138, so it looks safe — our inference, not a vendor statement
Avira Prime· Avira
95%
v < 8.3.54.138
Affected range stops below 8.3.54.138, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

x_refsource_MISCThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/156472/AVIRA-Generic-Malformed-Container-Bypass.html
Mailing Listx_refsource_FULLDISCThird Party Advisory
Source: [email protected]
http://seclists.org/fulldisclosure/2020/Feb/31
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://blog.zoller.lu/p/from-low-hanging-fruit-department-avira.html
x_refsource_MISC
Source: [email protected]
https://www.zoller.lu/%5BTZO-01-2020%5D%20AVIRA%20Generic%20Bypass%20ISO.pdf

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-434

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