SB2020070904 - Privilege escalation in FreeBSD
Published: July 9, 2020
Security Bulletin ID
SB2020070904
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2020-7457)
CWE-ID: CWE-416 - Use After Free
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:A/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition followed by a use-after-free error when processing IPv6 header options set by the IPV6_2292PKTOPTIONS socket option. A local user can set specially crafted IPv6 header options, trigger memory corruption and execute arbitrary code on the system with elevated privileges.
Remediation
Install update from vendor's website.