SB2020081311 - Remote command execution in Firejail

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) OS Command Injection (CVE-ID: CVE-2020-17367)

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to application does not honor the -- end-of-options indicator after the --output option. A remote unauthenticated attacker can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) OS Command Injection (CVE-ID: CVE-2020-17368)

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation when processing shell metacharacters  during use of the --output or --output-stderr option. A remote unauthenticated attacker can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://github.com/netblue30/firejail
• https://www.debian.org/security/2020/dsa-4742
• https://www.debian.org/security/2020/dsa-4743
• https://github.com/netblue30/firejail/