CVE-2019-11478
5.3 · MEDIUMOverview
CVE-2019-11478 is a medium-severity vulnerability affecting linux linux_kernel. It was published on June 19, 2019 and has a CVSS 3.0 base score of 5.3 (MEDIUM).
This vulnerability has a CVSS 3.0 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Jonathan Looney discovered that the TCP retransmission queue implementation in tcp_fragment in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commit f070ef2ac66716357066b683fb0baf55f8191a2e.
Remediation
Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| linux | linux_kernel | >= 0, < 4.4.182 | Affected |
| f5 | big-ip_advanced_firewall_manager | 11.5.2 | Affected |
| f5 | big-ip_access_policy_manager | 11.5.2 | Affected |
| f5 | big-ip_application_acceleration_manager | 11.5.2 | Affected |
| f5 | big-ip_link_controller | 11.5.2 | Affected |
| f5 | big-ip_policy_enforcement_manager | 11.5.2 | Affected |
| f5 | big-ip_webaccelerator | 11.5.2 | Affected |
| f5 | big-ip_application_security_manager | 11.5.2 | Affected |
| f5 | big-ip_local_traffic_manager | 11.5.2 | Affected |
| f5 | big-ip_fraud_protection_service | 11.5.2 | Affected |
| f5 | big-ip_global_traffic_manager | 11.5.2 | Affected |
| f5 | big-ip_analytics | 11.5.2 | Affected |
| f5 | big-ip_edge_gateway | 11.5.2 | Affected |
| f5 | big-ip_domain_name_system | 11.5.2 | Affected |
References
Frequently Asked Questions
What is CVE-2019-11478?
CVE-2019-11478 is a medium-severity vulnerability affecting linux linux_kernel. It was published on June 19, 2019 and has a CVSS 3.0 base score of 5.3 (MEDIUM).
How severe is CVE-2019-11478?
This vulnerability has a CVSS 3.0 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2019-11478?
Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2019-11478?
CyberStrike's AI-powered security agents can automatically detect CVE-2019-11478 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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