Multiple vulnerabilities in F-Secure SAFE Browser
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2021-33595 CVE-2021-33594 CVE-2021-33596 |
| CWE-ID | CWE-451 CWE-1021 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
F-Secure Safe Browser Client/Desktop applications / Antivirus software/Personal firewalls |
| Vendor | F-Secure |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Spoofing attack
EUVDB-ID: #VU55849
Risk: Medium
CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-33595
CWE-ID:
CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to incorrect processing of user-supplied data. A remote attacker can trick a victim to click on a specially crafted URL and spoof page content.
MitigationInstall updates from vendor's website.
Vulnerable software versionsF-Secure Safe Browser: 18.3.0
CPE2.3- cpe:2.3:a:f-secure:f-secure_safe_browser:*:*:*:*:*:*:*:*
- cpe:2.3:a:f-secure:f-secure_safe_browser:18.3.0:*:*:*:*:*:*:*
https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame
https://www.f-secure.com/en/business/support-and-downloads/security-advisories
https://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-33595
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Spoofing attack
EUVDB-ID: #VU55850
Risk: Medium
CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-33594
CWE-ID:
CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to incorrect processing of user-supplied data. A remote attacker can trick a victim to click on a specially crafted URL and spoof page content. and performa a dneialof service conriion on the targe system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsF-Secure Safe Browser: 18.3.0
CPE2.3- cpe:2.3:a:f-secure:f-secure_safe_browser:*:*:*:*:*:*:*:*
- cpe:2.3:a:f-secure:f-secure_safe_browser:18.3.0:*:*:*:*:*:*:*
https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame
https://www.f-secure.com/en/business/support-and-downloads/security-advisories
https://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-33594
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Improper Restriction of Rendered UI Layers or Frames
EUVDB-ID: #VU55851
Risk: Low
CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2021-33596
CWE-ID:
CWE-1021 - Improper Restriction of Rendered UI Layers or Frames
Exploit availability: No
DescriptionThe vulnerability allows a remot attacker to compromise the target system.
The vulnerability exists due to showing the legitimate URL in the address bar while loading the content from other domain. A remote authenticated attacker can trick a victim to click on a specially crafted URL and make the user believe that the content is served by a legit domain .
MitigationInstall updates from vendor's website.
Vulnerable software versionsF-Secure Safe Browser: 18.3.0
CPE2.3- cpe:2.3:a:f-secure:f-secure_safe_browser:*:*:*:*:*:*:*:*
- cpe:2.3:a:f-secure:f-secure_safe_browser:18.3.0:*:*:*:*:*:*:*
https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame
https://www.f-secure.com/en/business/support-and-downloads/security-advisories
https://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-33596
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
