CVE-2019-11477

HIGH

Linux kernel - DoS

Title source: llm

Description

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.

Exploits (1)

nomisec WORKING POC 8 stars

by sasqwatch · poc

https://github.com/sasqwatch/cve-2019-11477-poc

View Code ZIP pw:eip

References (29)

[Third Party Advisory, VDB Entry] http://packetstormsecurity.com/files/153346/Kernel-Live-Patch-Security-Notice-LSN-0052-1.html

[Third Party Advisory, VDB Entry] http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html

[Third Party Advisory] http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt

[Third Party Advisory] http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20191225-01-kernel-en

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2019/06/20/3

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2019/06/28/2

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2019/07/06/3

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2019/07/06/4

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2019/10/24/1

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2019/10/29/3

[Third Party Advisory] http://www.vmware.com/security/advisories/VMSA-2019-0010.html

[Third Party Advisory] https://access.redhat.com/errata/RHSA-2019:1594

[Third Party Advisory] https://access.redhat.com/errata/RHSA-2019:1602

[Third Party Advisory] https://access.redhat.com/errata/RHSA-2019:1699

[Third Party Advisory] https://access.redhat.com/security/vulnerabilities/tcpsack

[Third Party Advisory] https://cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf

[Mailing List, Patch, Vendor Advisory] https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=3b4929f65b0d8249f19a50245cd88ed1a2f78cff

[Patch, Third Party Advisory] https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md

[Third Party Advisory] https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193

[Third Party Advisory] https://kc.mcafee.com/corporate/index?page=content&id=SB10287

... and 9 more

Scores

CVSS v3 7.5

EPSS 0.7466

EPSS Percentile 98.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE

CWE-190

Status published

Products (47)

canonical/ubuntu_linux 12.04

canonical/ubuntu_linux 14.04

canonical/ubuntu_linux 16.04

canonical/ubuntu_linux 18.04

canonical/ubuntu_linux 18.10

canonical/ubuntu_linux 19.04

f5/big-ip_access_policy_manager 15.0.0

f5/big-ip_access_policy_manager 11.5.2 - 11.6.4

f5/big-ip_advanced_firewall_manager 15.0.0

f5/big-ip_advanced_firewall_manager 11.5.2 - 11.6.4

... and 37 more

Published Jun 19, 2019

Tracked Since Feb 18, 2026