SB2021102910 - Multiple vulnerabilities in Cisco Firepower Threat Defense Software
Published: October 29, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) External Control of File Name or Path (CVE-ID: CVE-2021-34761)
The vulnerability allows a local user to overwrite arbitrary files.
The vulnerability exists due to incomplete validation of user input for a specific CLI command. A local administrator can overwrite or append arbitrary data to system files.
2) Command Injection (CVE-ID: CVE-2021-34756)
The vulnerability allows a local user to execute arbitrary commands on the target system.
The vulnerability exists due to improper input validation in the CLI. A local user can pass specially crafted data to the application and execute arbitrary commands on the target device that is running in multi-instance mode.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
3) Command Injection (CVE-ID: CVE-2021-34755)
The vulnerability allows a local user to execute arbitrary commands on the target system.
The vulnerability exists due to improper input validation in the CLI. A local user can pass specially crafted data to the application and execute arbitrary commands on the target device that is running in multi-instance mode.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
4) Command Injection (CVE-ID: CVE-2021-34752)
The vulnerability allows a local user to execute arbitrary commands on the target system.
The vulnerability exists due to improper input validation in the CLI. A local administrator can pass specially crafted data to the application and execute arbitrary commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
5) Buffer overflow (CVE-ID: CVE-2021-34781)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the processing of SSH connections for multi-instance deployments. A remote attacker can trigger memory corruption and cause a denial of service condition on the target system.
Remediation
Install update from vendor's website.