Backdoor in Social Fixer Google Chrome extension

1) Backdoor

EUVDB-ID: #VU7959

Risk: Critical

CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red]

CVE-ID: N/A

CWE-ID: CWE-798 - Use of Hard-coded Credentials

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to victim's browser.

The vulnerability exists due to presence of backdoor code in Social Fixer Google Chrome extension 20.1.1, distributed via Google Web Store.

Mitigation

Update to version 20.2.0 or later.

Vulnerable software versions

Social Fixer (Chrome extension): 20.1.1

CPE2.3

• cpe:2.3:a:social_fixer:social_fixer_chrome_extension:20.1.1:*:*:*:*:google_chrome:*:*

External links

https://www.proofpoint.com/us/threat-insight/post/threat-actor-goes-chrome-extension-hijacking-spree
https://www.facebook.com/socialfixer/posts/10155117415829342

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?

Yes. This vulnerability is being exploited in the wild.