Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 4.4.182 |
| F5 | Big-Ip Advanced Firewall Manager | >= 11.5.2, <= 11.6.4 |
| F5 | Big-Ip Access Policy Manager | >= 11.5.2, <= 11.6.4 |
| F5 | Big-Ip Application Acceleration Manager | >= 11.5.2, <= 11.6.4 |
| F5 | Big-Ip Link Controller | >= 11.5.2, <= 11.6.4 |
| F5 | Big-Ip Policy Enforcement Manager | >= 11.5.2, <= 11.6.4 |
| F5 | Big-Ip Webaccelerator | >= 11.5.2, <= 11.6.4 |
| F5 | Big-Ip Application Security Manager | >= 11.5.2, <= 11.6.4 |
| F5 | Big-Ip Local Traffic Manager | >= 11.5.2, <= 11.6.4 |
| F5 | Big-Ip Fraud Protection Service | >= 11.5.2, <= 11.6.4 |
| F5 | Big-Ip Global Traffic Manager | >= 11.5.2, <= 11.6.4 |
| F5 | Big-Ip Analytics | >= 11.5.2, <= 11.6.4 |
| F5 | Big-Ip Edge Gateway | >= 11.5.2, <= 11.6.4 |
| F5 | Big-Ip Domain Name System | >= 11.5.2, <= 11.6.4 |
| Canonical | Ubuntu Linux | 12.04 |
| Redhat | Enterprise Linux Atomic Host | - |
| Redhat | Enterprise Linux | 5.0 |
| Redhat | Enterprise Linux Aus | 6.5 |
| Redhat | Enterprise Linux Eus | 7.4 |
| Redhat | Enterprise Mrg | 2.0 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/153346/Kernel-Live-Patch-Security-Notice-LSThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LS
- http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LS
- http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt
- http://www.openwall.com/lists/oss-security/2019/06/28/2
- http://www.openwall.com/lists/oss-security/2019/07/06/3
- http://www.openwall.com/lists/oss-security/2019/07/06/4
- http://www.openwall.com/lists/oss-security/2019/10/24/1
- http://www.openwall.com/lists/oss-security/2019/10/29/3
- http://www.vmware.com/security/advisories/VMSA-2019-0010.html
- https://access.redhat.com/errata/RHSA-2019:1594
- https://access.redhat.com/errata/RHSA-2019:1602
- https://access.redhat.com/errata/RHSA-2019:1699
- https://access.redhat.com/security/vulnerabilities/tcpsackThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf
FAQ
What is CVE-2019-11478?
CVE-2019-11478 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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....
How severe is CVE-2019-11478?
CVE-2019-11478 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-11478?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Access Policy Manager, F5 Big-Ip Application Acceleration Manager, F5 Big-Ip Link Controller.