#VU18813 Integer overflow in Linux kernel - CVE-2019-11477
Published: June 17, 2019 / Updated: May 30, 2020
Vulnerability identifier: #VU18813
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-11477
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a remote attacker to perform denial of service (DoS) attack.
The vulnerability exists due to integer overflow when handling TCP Selective Acknowledgments (SACKs) due to incorrect processing of TCP_SKB_CB(skb)->tcp_gso_segs value in Linux kernel. A remote non-authenticated attacker can send specially crafted network traffic to the affected system, trigger integer overflow and render the system unavailable.
Successful exploitation of the vulnerability allows a remote attacker to perform denial of service (DoS) attack.
Remediation
Update your kernel to the latest version.
External links
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.182
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.182
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.127
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.52
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.11
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2