SB2025102304 - Spoofing attack in FreeBSD connect(2) for UDP sockets
Published: October 23, 2025
Security Bulletin ID
SB2025102304
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) State Issues (CVE-ID: CVE-2025-24934)
CWE-ID: CWE-371 - State Issues
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:L/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform spoofing attacks.
The vulnerability exists due to the OS kernel fails to check the connection state of the sockets when adding them to a load-balancing group, which leads to incoming UDP packets being sent from any host instead of the connected host. A remote attacker can abuse such behavior to perform spoofing attacks.
Remediation
Install update from vendor's website.