CVE-2019-11477
HIGH severity · CVSS 7.5 · Integer overflow
7.5CVSS HIGH
Summary
Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). 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 3b4929f65b0d8249f19a50245cd88ed1a2f78cff.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)99%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (2)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://packetstormsecurity.com/files/153346/Kernel-Live-Patch-Security-Notice-LSN-0052-1.htmlAdvisory
- http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.htmlAdvisory
- http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txtAdvisory
- http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20191225-01-kernel-enAdvisory
- http://www.openwall.com/lists/oss-security/2019/06/20/3Advisory
- http://www.openwall.com/lists/oss-security/2019/06/28/2Advisory
- http://www.openwall.com/lists/oss-security/2019/07/06/3Advisory
- http://www.openwall.com/lists/oss-security/2019/07/06/4Advisory