SB2021011113 - Cross-site scripting in Zonote

Description

This security bulletin contains information about 1 vulnerability.

1) Cross-site scripting (CVE-ID: CVE-2020-35717)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks via a crafted note, with resultant Remote Code Execution (because nodeIntegration in webPreferences is true).

The vulnerability exists due to insufficient sanitization of user-supplied data within a specially crafted note. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Remediation

Install update from vendor's website.

References

• https://github.com/hmartos/cve-2020-35717
• https://github.com/zonetti/zonote
• https://medium.com/bugbountywriteup/remote-code-execution-through-cross-site-scripting-in-electron-f3b891ad637
• https://www.electronjs.org/apps/zonote