Multiple vulnerabilities in Zyxel GS1900, XGS1210 and XGS1250 series switches
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2021-35031 CVE-2021-35032 |
| CWE-ID | CWE-78 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software |
GS1900-8 Hardware solutions / Routers & switches, VoIP, GSM, etc XGS1210-12 Hardware solutions / Routers & switches, VoIP, GSM, etc XGS1250-12 Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-8HP Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-10HP Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-16 Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-24E Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-24EP Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-24 Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-24HP Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-24HPv2 Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-48 Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-48HP Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-48HPv2 Hardware solutions / Routers & switches, VoIP, GSM, etc |
| Vendor | ZyXEL Communications Corp. |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) OS Command Injection
EUVDB-ID: #VU59128
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-35031
CWE-ID:
CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Exploit availability: No
DescriptionThe vulnerability allows a local user to execute arbitrary shell commands on the target system.
The vulnerability exists due to improper input validation in the TFTP client. A local user can pass specially crafted data to the application and execute arbitrary OS commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsGS1900-8: before 2.70
XGS1210-12: before 1.00
XGS1250-12: before 1.00
CPE2.3- cpe:2.3:h:zyxel_communications_corp:gs1900-8:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:xgs1210-12:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:xgs1250-12:*:*:*:*:*:*:*:
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.
The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) OS Command Injection
EUVDB-ID: #VU59129
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-35032
CWE-ID:
CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Exploit availability: No
DescriptionThe vulnerability allows a local user to execute arbitrary shell commands on the target system.
The vulnerability exists due to improper input validation in the libsal.so. A local user can pass specially crafted data to the application and execute arbitrary OS commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsGS1900-8HP: before 2.70
GS1900-10HP: before 2.70
GS1900-16: before 2.70
GS1900-24E: before 2.70
GS1900-24EP: before 2.70
GS1900-24: before 2.70
GS1900-24HP: before 2.70
GS1900-24HPv2: before 2.70
GS1900-48: before 2.70
GS1900-48HP: before 2.70
GS1900-48HPv2: before 2.70
CPE2.3- cpe:2.3:h:zyxel_communications_corp:gs1900-8hp:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:gs1900-10hp:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:gs1900-16:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:gs1900-24e:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:gs1900-24ep:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:gs1900-24:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:gs1900-24hp:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:gs1900-24hpv2:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:gs1900-48:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:gs1900-48hp:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:gs1900-48hpv2:*:*:*:*:*:*:*:
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.
The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
