SB2019082613 - Remote denial of service in OpenBSD
Published: August 26, 2019 Updated: December 5, 2019
Security Bulletin ID
SB2019082613
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Resource exhaustion (CVE-ID: CVE-2019-8460)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an error when processing TCP SACK packets. A remote attacker can force the system to create long chains of TCP SACK holes that causes very expensive calls to tcp_sack_option() for every incoming SACK packet.
Successful exploitation of the vulnerability may result in a denial of service (DoS) attack.
Remediation
Install update from vendor's website.