Linux and FreeBSD Kernel Vulnerability
Date: 07 August 2018
The purpose of this advisory is to bring attention to a Linux and FreeBSD kernel TCP vulnerability.
Vulnerability in the implementation of the TCP protocol has been discovered in the kernel of Linux and FreeBSD that may lead to system resource exhaustion. A remote attacker may be able to trigger a denial-of-service condition against a system with an available open port.
- Linux kernel versions 4.9 and greater
- All supported versions of FreeBSD
CVE References: CVE-2018-5390, CVE-2018-6922
CCIRC recommends that system administrators test and deploy the vendor-released updates to affected applications accordingly.
Note to Readers
In support of Public Safety's mission to build a safe and resilient Canada, CCIRC's mandate is to help ensure the security and resilience of the vital non-federal government cyber systems that underpin Canada's national security, public safety and economic prosperity. As Canada's computer security incident response team, CCIRC is Canada's national coordination centre for the prevention and mitigation of, preparedness for, response to, and recovery from cyber incidents on non-federal government systems. It does this by providing authoritative advice and support, and coordinating information sharing and incident response.
Please note, CCIRC PGP key has recently been updated.
For general information, please contact Public Safety Canada's Public Affairs division at:
Telephone: 613-944-4875 or 1-800-830-3118
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