CRLF injection in Zyxel firewalls
| Risk | Medium |
| Patch available | NO |
| Number of vulnerabilities | 1 |
| CVE-ID | N/A |
| CWE-ID | CWE-93 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
USG100 Client/Desktop applications / Antivirus software/Personal firewalls USG200 Client/Desktop applications / Antivirus software/Personal firewalls USG300 Client/Desktop applications / Antivirus software/Personal firewalls USG20W Client/Desktop applications / Antivirus software/Personal firewalls USG20 Client/Desktop applications / Antivirus software/Personal firewalls USG50 Client/Desktop applications / Antivirus software/Personal firewalls |
| Vendor | ZyXEL Communications Corp. |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) CRLF injection
EUVDB-ID: #VU64055
Risk: Medium
CVSSv3.1: 4.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:U/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to inject arbitrary data in server response.
The vulnerability exists due to insufficient validation of attacker-supplied data in the CGI program. A remote attacker can pass specially crafted data to the application containing CR-LF characters and modify application behavior.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsUSG100: All versions
USG200: All versions
USG300: All versions
USG20W: All versions
USG20: All versions
USG50: All versions
External linksQ & 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.
