CVE-2021-35032 : A vulnerability in the 'libsal.so' of the Zyxel GS1900 series firmware version 2

A vulnerability in the 'libsal.so' of the Zyxel GS1900 series firmware version 2.60 could allow an authenticated local user to execute arbitrary OS commands via a crafted function call.

Published 2021-12-28 11:15:08

Updated 2022-01-07 17:01:26

Source Zyxel Corporation

View at NVD, CVE.org

Products affected by CVE-2021-35032

Zyxel » Gs1900-8 Firmware
Versions before (<) 2.70\(aahh.0\)-20211208
cpe:2.3:o:zyxel:gs1900-8_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Gs1900-8 » Version: N/A
Zyxel » Gs1900-24 Firmware
Versions before (<) 2.70\(aahl.0\)-20211208
cpe:2.3:o:zyxel:gs1900-24_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Gs1900-24 » Version: N/A
Zyxel » Gs1900-8hp Firmware
Versions before (<) 2.70\(aahi.0\)-20211208
cpe:2.3:o:zyxel:gs1900-8hp_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Gs1900-8hp » Version: N/A
Zyxel » Gs1900-10hp Firmware
Versions before (<) 2.70\(aazi.0\)-20211208
cpe:2.3:o:zyxel:gs1900-10hp_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Gs1900-10hp » Version: N/A
Zyxel » Gs1900-16 Firmware
Versions before (<) 2.70\(aahj.0\)-20211208
cpe:2.3:o:zyxel:gs1900-16_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Gs1900-16 » Version: N/A
Zyxel » Gs1900-24e Firmware
Versions before (<) 2.70\(aahk.0\)-20211208
cpe:2.3:o:zyxel:gs1900-24e_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Gs1900-24e » Version: N/A
Zyxel » Gs1900-24hp Firmware
Versions before (<) 2.70\(aahm.0\)-20211208
cpe:2.3:o:zyxel:gs1900-24hp_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Gs1900-24hp » Version: N/A
Zyxel » Gs1900-48 Firmware
Versions before (<) 2.70\(aahn.0\)-20211208
cpe:2.3:o:zyxel:gs1900-48_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Gs1900-48 » Version: N/A
Zyxel » Gs1900-48hp Firmware
Versions before (<) 2.70\(aaho.0\)-20211208
cpe:2.3:o:zyxel:gs1900-48hp_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Gs1900-48hp » Version: N/A
Zyxel » Gs1900-24ep Firmware
Versions before (<) 2.70\(abto.0\)-20211208
cpe:2.3:o:zyxel:gs1900-24ep_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Gs1900-24ep » Version: N/A
Zyxel » Gs1900-24hpv2 Firmware
Versions before (<) 2.70\(aatp.0\)-20211208
cpe:2.3:o:zyxel:gs1900-24hpv2_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Gs1900-24hpv2 » Version: N/A
Zyxel » Gs1900-48hpv2 Firmware
Versions before (<) 2.70\(abtq.0\)-20211208
cpe:2.3:o:zyxel:gs1900-48hpv2_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Gs1900-48hpv2 » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2021-35032

EPSS FAQ

0.04%

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

~ 6 %

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

CVSS scores for CVE-2021-35032

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.2	HIGH	AV:L/AC:L/Au:N/C:C/I:C/A:C	3.9	10.0	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete
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
6.4	MEDIUM	CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H	0.5	5.9	Zyxel Corporation
Attack Vector: Local Attack Complexity: High Privileges Required: High User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2021-35032

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
Assigned by:
- nvd@nist.gov (Primary)
- security@zyxel.com.tw (Secondary)

References for CVE-2021-35032

https://www.zyxel.com/support/Zyxel_security_advisory_for_OS_command_injection_vulnerabilities_of_switches.shtml

Zyxel security advisory for OS command injection vulnerabilities of GS1900, XGS1210, and XGS1250 series switches | Zyxel
Patch;Vendor Advisory

CVEs referencing this url

Jump to

Vulnerability Details : CVE-2021-35032

Products affected by CVE-2021-35032

Exploit prediction scoring system (EPSS) score for CVE-2021-35032

CVSS scores for CVE-2021-35032

CWE ids for CVE-2021-35032

References for CVE-2021-35032