Multiple vulnerabilities in RevoWorks Browser



Published: 2021-09-10
Risk High
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2021-20790
CVE-2021-20791
CWE-ID CWE-94
CWE-284
Exploitation vector Network
Public exploit N/A
Vulnerable software
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RevoWorks Browser
Client/Desktop applications / Web browsers

Vendor J’s Communication Co

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Code Injection

EUVDB-ID: #VU56438

Risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-20790

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation. A remote attacker can execute arbitrary code on the web browser of the user which is running under the isolated environment.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

RevoWorks Browser: 2.1.197 - 2.1.230

External links

http://jvn.jp/en/jp/JVN81658818/index.html
http://jscom.jp/news-20210910_2/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Improper access control

EUVDB-ID: #VU56439

Risk: Low

CVSSv3.1: 4.5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-20791

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a local user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A local user can bypass implemented security restrictions and alter settings of the web browser.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

RevoWorks Browser: 2.1.197 - 2.1.230

External links

http://jvn.jp/en/jp/JVN81658818/index.html


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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