CVE-2020-9342

F-SECURE Generic Malformed Container Bypass

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The F-Secure AV parsing engine before 2020-02-05 allows virus-detection bypass via crafted Compression Method data in a GZIP archive. This affects versions before 17.0.605.474 (on Linux) of Cloud Protection For Salesforce, Email and Server Security, and Internet GateKeeper.

El motor de análisis de F-Secure AV antes del 05-02-2020, permite omitir la detección de virus mediante datos de Compression Method diseñados en un archivo GZIP. Esto afecta a las versiones anteriores a 17.0.605.474 (en Linux) de Cloud Protection For Salesforce, Email y Server Security, y Internet GateKeeper.

The F-SECURE parsing engine supports the GZIP Archive. The parsing engine can be bypassed by manipulating a GZIP archive (Compression Method). This way the User can extract the file but the AV Engine cannot giving the file a clean pass. Various products and versions are affected.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-02-22 CVE Reserved
2020-02-22 CVE Published
2024-08-04 CVE Updated
2025-02-15 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-436: Interpretation Conflict

CAPEC

References (4)

URL	Tag	Source
http://packetstormsecurity.com/files/156506/F-SECURE-Generic-Malformed-Container-Bypass.html	Third Party Advisory
http://seclists.org/fulldisclosure/2020/Feb/33	Mailing List
https://blog.zoller.lu/p/tzo-16-2020-f-secure-generic-malformed.html	Third Party Advisory
https://seclists.org/bugtraq/2020/Feb/33	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
F-secure Search vendor "F-secure"		Cloud Protection For Salesforce Search vendor "F-secure" for product "Cloud Protection For Salesforce"				< 17.0.605.474 Search vendor "F-secure" for product "Cloud Protection For Salesforce" and version " < 17.0.605.474"		linux_kernel		Affected
F-secure Search vendor "F-secure"		Email And Server Security Search vendor "F-secure" for product "Email And Server Security"				< 17.0.605.474 Search vendor "F-secure" for product "Email And Server Security" and version " < 17.0.605.474"		linux_kernel		Affected
F-secure Search vendor "F-secure"		Internet Gatekeeper Search vendor "F-secure" for product "Internet Gatekeeper"				< 17.0.605.474 Search vendor "F-secure" for product "Internet Gatekeeper" and version " < 17.0.605.474"		linux_kernel		Affected