SB2020092312 - Spoofing attack in firefox-esr (Alpine package)

Description

This security bulletin contains information about 1 vulnerability.

1) Spoofing attack (CVE-ID: CVE-2020-15677)

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to way Firefox displays name of the data origin when downloading files. A remote attacker can spoof origin of the downloaded file and display the name of the intermediate website instead of the original source name.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack but requires that the spoofed website has an open redirect vulnerability.

Remediation

Install update from vendor's website.

References

• https://git.alpinelinux.org/aports/commit/?id=352089c9e64ae440e318f91274b6fbe64f3c6b13
• https://git.alpinelinux.org/aports/commit/?id=3438f65660550f31484251e11f7227972f800ba2