Vulnerability identifier: #VU63555
Vulnerability risk: Low
CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-79
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
USG series
Client/Desktop applications /
Antivirus software/Personal firewalls
USG FLEX series
Client/Desktop applications /
Antivirus software/Personal firewalls
VPN series
Client/Desktop applications /
Antivirus software/Personal firewalls
ZyWALL
Other software /
Other software solutions
ATP series
Hardware solutions /
Routers for home users
Vendor: ZyXEL Communications Corp.
Description
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in the CGI program. 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.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
USG series: 4.35 - 4.70
ZyWALL: 4.35 - 4.70
USG FLEX series: 4.50 - 5.20
ATP series: 4.35 - 5.20
VPN series: 4.35 - 5.20
External links
http://www.zyxel.com/support/multiple-vulnerabilities-of-firewalls-AP-controllers-and-APs.shtml
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.