CVE-2022-30526 : A privilege escalation vulnerability was identified in the CLI command of Zyxel

A privilege escalation vulnerability was identified in the CLI command of Zyxel USG FLEX 100(W) firmware versions 4.50 through 5.30, USG FLEX 200 firmware versions 4.50 through 5.30, USG FLEX 500 firmware versions 4.50 through 5.30, USG FLEX 700 firmware versions 4.50 through 5.30, USG FLEX 50(W) firmware versions 4.16 through 5.30, USG20(W)-VPN firmware versions 4.16 through 5.30, ATP series firmware versions 4.32 through 5.30, VPN series firmware versions 4.30 through 5.30, USG/ZyWALL series firmware versions 4.09 through 4.72, which could allow a local attacker to execute some OS commands with root privileges in some directories on a vulnerable device.

Published 2022-07-19 06:15:09

Updated 2022-12-13 15:38:54

Source Zyxel Corporation

View at NVD, CVE.org

Vulnerability category: Gain privilege

Products affected by CVE-2022-30526

Zyxel » Zywall 110 Firmware
Versions from including (>=) 4.30 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:zywall_110_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Zywall 110 » Version: N/A
Zyxel » Zywall 1100 Firmware
Versions from including (>=) 4.30 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:zywall_1100_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Zywall 1100 » Version: N/A
Zyxel » Zywall 310 Firmware
Versions from including (>=) 4.30 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:zywall_310_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Zywall 310 » Version: N/A
Zyxel » Usg 2200-vpn Firmware
Versions from including (>=) 4.30 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:usg_2200-vpn_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Usg 2200-vpn » Version: N/A
Zyxel » Atp200 Firmware
Versions from including (>=) 4.32 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Atp200 » Version: N/A
Zyxel » Atp500 Firmware
Versions from including (>=) 4.32 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Atp500 » Version: N/A
Zyxel » Atp800 Firmware
Versions from including (>=) 4.32 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:atp800_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Atp800 » Version: N/A
Zyxel » Usg20-vpn Firmware
Versions from including (>=) 4.30 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:usg20-vpn_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Usg20-vpn » Version: N/A
Zyxel » Usg20w-vpn Firmware
Versions from including (>=) 4.16 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:usg20w-vpn_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Usg20w-vpn » Version: N/A
Zyxel » Usg40 Firmware
Versions from including (>=) 4.09 and up to, including, (<=) 4.72
cpe:2.3:o:zyxel:usg40_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Usg40 » Version: N/A
Zyxel » Usg40w Firmware
Versions from including (>=) 4.09 and up to, including, (<=) 4.72
cpe:2.3:o:zyxel:usg40w_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Usg40w » Version: N/A
Zyxel » Usg60 Firmware
Versions from including (>=) 4.09 and up to, including, (<=) 4.72
cpe:2.3:o:zyxel:usg60_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Usg60 » Version: N/A
Zyxel » Usg60w Firmware
Versions from including (>=) 4.09 and up to, including, (<=) 4.72
cpe:2.3:o:zyxel:usg60w_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Usg60w » Version: N/A
Zyxel » Vpn50 Firmware
Versions from including (>=) 4.30 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:vpn50_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Vpn50 » Version: N/A
Zyxel » Vpn100 Firmware
Versions from including (>=) 4.30 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:vpn100_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Vpn100 » Version: N/A
Zyxel » Vpn300 Firmware
Versions from including (>=) 4.30 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:vpn300_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Vpn300 » Version: N/A
Zyxel » Atp100 Firmware
Versions from including (>=) 4.32 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Atp100 » Version: N/A
Zyxel » Vpn1000 Firmware
Versions from including (>=) 4.30 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:vpn1000_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Vpn1000 » Version: N/A
Zyxel » Usg Flex 200 Firmware
Versions from including (>=) 4.50 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:usg_flex_200_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Usg Flex 200 » Version: N/A
Zyxel » Usg Flex 500 Firmware
Versions from including (>=) 4.50 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Usg Flex 500 » Version: N/A
Zyxel » Usg Flex 100w Firmware
Versions from including (>=) 4.50 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Usg Flex 100w » Version: N/A
Zyxel » Usg Flex 700 Firmware
Versions from including (>=) 4.50 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:usg_flex_700_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Usg Flex 700 » Version: N/A
Zyxel » Atp100w Firmware
Versions from including (>=) 4.32 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:atp100w_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Atp100w » Version: N/A
Zyxel » Atp700 Firmware
Versions from including (>=) 4.32 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:atp700_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Atp700 » Version: N/A
Zyxel » Usg Flex 50w Firmware
Versions from including (>=) 4.16 and up to, including, (<=) 5.30
cpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Usg Flex 50w » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2022-30526

EPSS FAQ

3.02%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 85 %

Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2022-30526

Zyxel Firewall SUID Binary Privilege Escalation

Disclosure Date: 2022-06-14

First seen: 2022-12-23

exploit/linux/local/zyxel_suid_cp_lpe

This module exploits CVE-2022-30526, a local privilege escalation vulnerability that allows a low privileged user (e.g. nobody) escalate to root. The issue stems from a suid binary that allows all users to copy files as root. This module overwrites the firewa

More information

CVSS scores for CVE-2022-30526

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.8	HIGH	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	1.8	5.9	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High
7.8	HIGH	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	1.8	5.9	Zyxel Corporation
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2022-30526

CWE-269 Improper Privilege Management

The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
Assigned by:
- nvd@nist.gov (Primary)
- security@zyxel.com.tw (Secondary)

References for CVE-2022-30526

http://packetstormsecurity.com/files/168202/Zyxel-Firewall-SUID-Binary-Privilege-Escalation.html

Zyxel Firewall SUID Binary Privilege Escalation ≈ Packet Storm
Exploit;Third Party Advisory;VDB Entry

CVEs referencing this url
https://www.zyxel.com/support/Zyxel-security-advisory-authenticated-directory-traversal-vulnerabilities-of-firewalls.shtml

Zyxel security advisory for local privilege escalation and authenticated directory traversal vulnerabilities of firewalls | Zyxel
Vendor Advisory

CVEs referencing this url

Jump to