high
7.5
CWE
400 770
Advisory Published
CVE Published
CVE Published
Updated

CVE-2019-11478: SACK can cause extensive memory use via fragmented resend queue

First published: Tue Jun 11 2019(Updated: )

An excessive resource consumption flaw was found in the way the Linux kernel's networking subsystem processed TCP Selective Acknowledgment (SACK) segments. While processing SACK segments, the Linux kernel's socket buffer (SKB) data structure becomes fragmented, which leads to increased resource utilization to traverse and process these fragments as further SACK segments are received on the same TCP connection. A remote attacker could use this flaw to cause a denial of service (DoS) by sending a crafted sequence of SACK segments on a TCP connection.

Credit: security@ubuntu.com

Affected SoftwareAffected VersionHow to fix
redhat/kernel<0:2.6.32-754.15.3.el6
0:2.6.32-754.15.3.el6
redhat/kernel<0:2.6.32-431.95.3.el6
0:2.6.32-431.95.3.el6
redhat/kernel<0:2.6.32-504.79.3.el6
0:2.6.32-504.79.3.el6
redhat/kernel-rt<0:3.10.0-957.21.3.rt56.935.el7
0:3.10.0-957.21.3.rt56.935.el7
redhat/kernel<0:3.10.0-957.21.3.el7
0:3.10.0-957.21.3.el7
redhat/kernel-alt<0:4.14.0-115.8.2.el7a
0:4.14.0-115.8.2.el7a
redhat/kernel<0:3.10.0-327.79.2.el7
0:3.10.0-327.79.2.el7
redhat/kernel<0:3.10.0-514.66.2.el7
0:3.10.0-514.66.2.el7
redhat/kernel<0:3.10.0-693.50.3.el7
0:3.10.0-693.50.3.el7
redhat/kernel<0:3.10.0-862.34.2.el7
0:3.10.0-862.34.2.el7
redhat/kernel-rt<0:4.18.0-80.4.2.rt9.152.el8_0
0:4.18.0-80.4.2.rt9.152.el8_0
redhat/kernel<0:4.18.0-80.4.2.el8_0
0:4.18.0-80.4.2.el8_0
redhat/kernel-rt<1:3.10.0-693.50.3.rt56.644.el6
1:3.10.0-693.50.3.rt56.644.el6
redhat/redhat-release-virtualization-host<0:4.2-11.1.el7
0:4.2-11.1.el7
redhat/redhat-virtualization-host<0:4.2-20190618.0.el7_6
0:4.2-20190618.0.el7_6
redhat/redhat-release-virtualization-host<0:4.3.4-1.el7e
0:4.3.4-1.el7e
redhat/redhat-virtualization-host<0:4.3.4-20190620.3.el7_6
0:4.3.4-20190620.3.el7_6
debian/linux
4.19.249-2
4.19.289-2
5.10.197-1
5.10.191-1
6.1.66-1
6.1.52-1
6.5.13-1
6.6.8-1
Linux Kernel<4.4.182
Linux Kernel>=4.5<4.9.182
Linux Kernel>=4.10<4.14.127
Linux Kernel>=4.15<4.19.52
Linux Kernel>=4.20<5.1.11
F5 BIG-IP Advanced Firewall Manager>=11.5.2<=11.6.4
F5 BIG-IP Advanced Firewall Manager>=12.1.0<=12.1.4
F5 BIG-IP Advanced Firewall Manager>=13.1.0<=13.1.1
F5 BIG-IP Advanced Firewall Manager>=14.0.0<=14.1.0
F5 BIG-IP Advanced Firewall Manager=15.0.0
F5 Access Policy Manager>=11.5.2<=11.6.4
F5 Access Policy Manager>=12.1.0<=12.1.4
F5 Access Policy Manager>=13.1.0<=13.1.1
F5 Access Policy Manager>=14.0.0<=14.1.0
F5 Access Policy Manager=15.0.0
F5 BIG-IP Application Acceleration Manager>=11.5.2<=11.6.4
F5 BIG-IP Application Acceleration Manager>=12.1.0<=12.1.4
F5 BIG-IP Application Acceleration Manager>=13.1.0<=13.1.1
F5 BIG-IP Application Acceleration Manager>=14.0.0<=14.1.0
F5 BIG-IP Application Acceleration Manager=15.0.0
F5 BIG-IP Link Controller>=11.5.2<=11.6.4
F5 BIG-IP Link Controller>=12.1.0<=12.1.4
F5 BIG-IP Link Controller>=13.1.0<=13.1.1
F5 BIG-IP Link Controller>=14.0.0<=14.1.0
F5 BIG-IP Link Controller=15.0.0
F5 BIG-IP Policy Enforcement Manager>=11.5.2<=11.6.4
F5 BIG-IP Policy Enforcement Manager>=12.1.0<=12.1.4
F5 BIG-IP Policy Enforcement Manager>=13.1.0<=13.1.1
F5 BIG-IP Policy Enforcement Manager>=14.0.0<=14.1.0
F5 BIG-IP Policy Enforcement Manager=15.0.0
F5 BIG-IP WebAccelerator>=11.5.2<=11.6.4
F5 BIG-IP WebAccelerator>=12.1.0<=12.1.4
F5 BIG-IP WebAccelerator>=13.1.0<=13.1.1
F5 BIG-IP WebAccelerator>=14.0.0<=14.1.0
F5 BIG-IP WebAccelerator=15.0.0
F5 Application Security Manager>=11.5.2<=11.6.4
F5 Application Security Manager>=12.1.0<=12.1.4
F5 Application Security Manager>=13.1.0<=13.1.1
F5 Application Security Manager>=14.0.0<=14.1.0
F5 Application Security Manager=15.0.0
Riverbed SteelApp Traffic Manager>=11.5.2<=11.6.4
Riverbed SteelApp Traffic Manager>=12.1.0<=12.1.4
Riverbed SteelApp Traffic Manager>=13.1.0<=13.1.1
Riverbed SteelApp Traffic Manager>=14.0.0<=14.1.0
Riverbed SteelApp Traffic Manager=15.0.0
F5 BIG-IP Fraud Protection Service>=11.5.2<=11.6.4
F5 BIG-IP Fraud Protection Service>=12.1.0<=12.1.4
F5 BIG-IP Fraud Protection Service>=13.1.0<=13.1.1
F5 BIG-IP Fraud Protection Service>=14.0.0<=14.1.0
F5 BIG-IP Fraud Protection Service=15.0.0
Riverbed SteelApp Traffic Manager>=11.5.2<=11.6.4
Riverbed SteelApp Traffic Manager>=12.1.0<=12.1.4
Riverbed SteelApp Traffic Manager>=13.1.0<=13.1.1
Riverbed SteelApp Traffic Manager>=14.0.0<=14.1.0
Riverbed SteelApp Traffic Manager=15.0.0
F5 BIG-IP Analytics>=11.5.2<=11.6.4
F5 BIG-IP Analytics>=12.1.0<=12.1.4
F5 BIG-IP Analytics>=13.1.0<=13.1.1
F5 BIG-IP Analytics>=14.0.0<=14.1.0
F5 BIG-IP Analytics=15.0.0
F5 BIG-IP Edge Gateway>=11.5.2<=11.6.4
F5 BIG-IP Edge Gateway>=12.1.0<=12.1.4
F5 BIG-IP Edge Gateway>=13.1.0<=13.1.1
F5 BIG-IP Edge Gateway>=14.0.0<=14.1.0
F5 BIG-IP Edge Gateway=15.0.0
F5 BIG-IP>=11.5.2<=11.6.4
F5 BIG-IP>=12.1.0<=12.1.4
F5 BIG-IP>=13.1.0<=13.1.1
F5 BIG-IP>=14.0.0<=14.1.0
F5 BIG-IP=15.0.0
Ubuntu=12.04
Ubuntu=14.04
Ubuntu=16.04
Ubuntu=18.04
Ubuntu=18.10
Ubuntu=19.04
Red Hat Enterprise Linux Atomic Host
Red Hat Enterprise Linux=5.0
Red Hat Enterprise Linux=6.0
Red Hat Enterprise Linux=7.0
Red Hat Enterprise Linux=8.0
Red Hat Enterprise Linux=6.5
Red Hat Enterprise Linux=6.6
Red Hat Enterprise Linux Server EUS=7.4
Red Hat Enterprise Linux Server EUS=7.5
Red Hat Enterprise MRG=2.0
Ivanti Pulse Connect Secure
Pulse Policy Secure
Pulse Secure Virtual Application Delivery Controller
F5 Traffix Systems Signaling Delivery Controller>=5.0.0<=5.1.0
Ivanti Pulse Connect Secure
Siemens Simatic Cloud Connect 7 CC712<1.1.5
1.1.5
Siemens ROX<2.13.3
2.13.3
Siemens RUGGEDCOM APE 1404 Linux
Siemens RUGGEDCOM RM1224<6.2
6.2
Siemens RUGGEDCOM RX 1400 VPE Debian Linux
Siemens RUGGEDCOM RX 1400 VPE
Siemens SCALANCE M804PB<6.2
6.2
Siemens Scalance M812-1 ADSL Router<6.2
6.2
Siemens Scalance M812-1 ADSL Router<6.2
6.2
Siemens Scalance M816-1 ADSL-Router Firmware<6.2
6.2
Siemens Scalance M816-1 ADSL-Router Firmware<6.2
6.2
Siemens SCALANCE M826-2 SHDSL-Router<6.2
6.2
Siemens SCALANCE M874-2<6.2
6.2
Siemens SCALANCE M874-3<6.2
6.2
Siemens Scalance M875 Firmware
Siemens SCALANCE M876-3<6.2
6.2
Siemens SCALANCE M876-3<6.2
6.2
Siemens SCALANCE M876-4<6.2
6.2
Siemens SCALANCE M876-4<6.2
6.2
Siemens Scalance S602 Firmware<4.1
4.1
Siemens Scalance S612 Firmware<4.1
4.1
Siemens SCALANCE S615<6.2
6.2
Siemens Scalance S623 Firmware<4.1
4.1
Siemens Scalance S627-2M Firmware<4.1
4.1
Siemens SCALANCE SC622-2C<2.0.1
2.0.1
Siemens SCALANCE SC632-2C<2.0.1
2.0.1
Siemens SCALANCE SC636-2C<2.0.1
2.0.1
Siemens SCALANCE SC642-2C<2.0.1
2.0.1
Siemens SCALANCE SC646-2C<2.0.1
2.0.1
Siemens Scalance W1750D Firmware<8.6.0
8.6.0
Siemens SCALANCE W-700<6.4
6.4
Siemens SCALANCE W1700 IEEE 802.11ac<2.0
2.0
Siemens SCALANCE WLC711
Siemens SCALANCE WLC712
Siemens SIMATIC CM 1542-1 Firmware<3.0
3.0
Siemens SIMATIC CP 343-1 Advanced

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=f070ef2ac66716357066b683fb0baf55f8191a2e

Remedy

https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md

Remedy

For mitigation, please refer to the Red Hat Knowledgebase article: https://access.redhat.com/security/vulnerabilities/tcpsack

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2019-11478?

    CVE-2019-11478 is classified as a medium severity vulnerability that affects the Linux kernel's networking subsystem.

  • How do I fix CVE-2019-11478?

    To fix CVE-2019-11478, upgrade to the latest patched version of the kernel as specified by your Linux distribution.

  • What versions of Linux are affected by CVE-2019-11478?

    CVE-2019-11478 affects various versions of the Linux kernel, particularly those prior to the patches released in response.

  • What types of exploits could target CVE-2019-11478?

    Exploits leveraging CVE-2019-11478 could lead to denial of service due to excessive resource consumption.

  • Is there a reference for CVE-2019-11478?

    Yes, details about CVE-2019-11478 can be found in the official CVE records and security advisories from Red Hat.

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