Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2020-9320

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

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.5, requiring local system access to exploit with relatively low complexity though user interaction is required and does not require pre-existing privileges . The vulnerability impacts integrity (unauthorized modifications), for affected systems. Impacting 8 products from avira, from avira, from avira and 5 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-02-20T22:15:12.257

Last Modified

2024-11-21T05:40:24.197

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.5 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-434

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	avira	anti-malware_sdk	< 8.3.54.138	Yes
Application	avira	antivirus_server	< 8.3.54.138	Yes
Application	avira	avira_antivirus_for_endpoint	< 8.3.54.138	Yes
Application	avira	avira_antivirus_for_small_business	< 8.3.54.138	Yes
Application	avira	avira_exchange_security	< 8.3.54.138	Yes
Application	avira	avira_free_security_suite	< 8.3.54.138	Yes
Application	avira	avira_internet_security_suite	< 8.3.54.138	Yes
Application	avira	avira_prime	< 8.3.54.138	Yes

References

http://packetstormsecurity.com/files/156472/AVIRA-Generic-Malformed-Container-Bypass.html Third Party Advisory, VDB Entry ([email protected])
http://seclists.org/fulldisclosure/2020/Feb/31 Mailing List, Third Party Advisory ([email protected])
https://blog.zoller.lu/p/from-low-hanging-fruit-department-avira.html Third Party Advisory ([email protected])
https://www.zoller.lu/%5BTZO-01-2020%5D%20AVIRA%20Generic%20Bypass%20ISO.pdf ([email protected])
http://packetstormsecurity.com/files/156472/AVIRA-Generic-Malformed-Container-Bypass.html Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2020/Feb/31 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://blog.zoller.lu/p/from-low-hanging-fruit-department-avira.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.zoller.lu/%5BTZO-01-2020%5D%20AVIRA%20Generic%20Bypass%20ISO.pdf (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For avira's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.