Privilege escalation in Zyxel GS1900 series switches



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-45853
CWE-ID CWE-264
Exploitation vector Local
Public exploit N/A
Vulnerable software
 GS1900-8
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

GS1900-24
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

GS1900-24HPv2
Hardware solutions / Routers & switches, VoIP, GSM, etc

GS1900-48
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 one low risk vulnerability.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU76987

Risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-45853

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local administrator to escalate privileges on the system.

The vulnerability exists due to application does not properly impose security restrictions, which leads to security restrictions bypass and privilege escalation.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

GS1900-8: 2.70(AAHH.3)

GS1900-8HP: 2.70(AAHI.3)

GS1900-10HP: 2.70(AAZI.3)

GS1900-16: 2.70(AAHJ.3)

GS1900-24: 2.70(AAHL.3

GS1900-24E: 2.70(AAHK.3)

GS1900-24EP: 2.70(ABTO.3)

GS1900-24HPv2: 2.70(ABTP.3)

GS1900-48: 2.70(AAHN.3)

GS1900-48HPv2: 2.70(ABTQ.3)

CPE2.3 External links

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-privilege-escalation-vulnerability-in-gs1900-series-switches


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.



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