SB2020080705 - Privilege escalation via USB drivers in FreeBSD
Published: August 7, 2020
Security Bulletin ID
SB2020080705
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Physical access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2020-7459)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to missing length validation code common to multiple USB network drivers. A local user can use a malicious USB device to write beyond the end of an allocated network packet buffer, trigger buffer overflow and execute arbitrary code on the system with elevated privileges.
Remediation
Install update from vendor's website.