SB2021060140 - Multiple vulnerabilities in Fortinet FortiWLC

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Main Vulnerability Database SB2021060140

SB2021060140 - Multiple vulnerabilities in Fortinet FortiWLC

Published: June 1, 2021 Updated: April 5, 2022

Security Bulletin ID SB2021060140
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Adjecent network
Highest impact Code execution

Breakdown by Severity

Medium 33% Low 67%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Stored cross-site scripting (CVE-ID: CVE-2021-26087)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Green


The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in FortiWLC web interface. A remote non-authenticated attacker can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.


2) Stack-based buffer overflow (CVE-ID: CVE-2021-26094)

CWE-ID: CWE-121 - Stack-based buffer overflow

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


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

The vulnerability exists due to a boundary error in the command line interface of FortiWLC. A local user can run a specially crafted CLI command to trigger stack-based buffer overflow and execute arbitrary code on the target system with elevated privileges.



3) Access of Uninitialized Pointer (CVE-ID: CVE-2021-26093)

CWE-ID: CWE-824 - Access of Uninitialized Pointer

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


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

The vulnerability exists due to a boundary error in the command line interface of FortiWLC. A local user can run a specially crafted CLI command to trigger access of uninitialized pointer and execute arbitrary code on the target system with elevated privileges.


Remediation

Install update from vendor's website.

References