critical
9.8
CWE
190
Advisory Published
CVE Published
Updated

CVE-2019-18805: Integer Overflow

First published: Tue Apr 16 2019(Updated: )

A flaw was reported in kernel TCP subsystem while calculating a packet round trip time, when a sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) when is set wrongly. This causes an integer over flaw which can lead to a Denial Of Service (DOS) attack. Additional Information: ----------------------- <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19fad20d15a6494f47f85d869f00b11343ee5c78">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19fad20d15a6494f47f85d869f00b11343ee5c78</a>

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/kernel-alt<0:4.14.0-115.18.1.el7a
0:4.14.0-115.18.1.el7a
redhat/kernel-rt<0:4.18.0-193.rt13.51.el8
0:4.18.0-193.rt13.51.el8
redhat/kernel<0:4.18.0-193.el8
0:4.18.0-193.el8
Linux Linux kernel>=4.4<4.4.180
Linux Linux kernel>=4.9<4.9.172
Linux Linux kernel>=4.14<4.14.115
Linux Linux kernel>=4.19<4.19.38
Linux Linux kernel>=5.0<5.0.11
Linux Linux kernel=5.1-rc1
Linux Linux kernel=5.1-rc2
Linux Linux kernel=5.1-rc3
Linux Linux kernel=5.1-rc4
Linux Linux kernel=5.1-rc5
Linux Linux kernel=5.1-rc6
Linux Linux kernel=5.1-rc7
openSUSE Leap=15.0
openSUSE Leap=15.1
Redhat Enterprise Linux=7.0
Netapp Active Iq Unified Manager Vmware Vsphere
Netapp Data Availability Services
NetApp E-Series SANtricity OS Controller>=11.0.0<=11.60.3
Netapp Hci Management Node
Netapp Solidfire
Netapp Steelstore Cloud Integrated Storage
Netapp Hci Compute Node
Netapp Hci Storage Node
Broadcom Fabric Operating System
Netapp Aff A700s Firmware
NetApp AFF A700s
Netapp Fas8300 Firmware
Netapp Fas8300
Netapp Fas8700 Firmware
Netapp Fas8700
Netapp Aff A400 Firmware
Netapp Aff A400
Netapp H610s Firmware
Netapp H610s

Remedy

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19fad20d15a6494f47f85d869f00b11343ee5c78

Remedy

This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2019-18805?

    The severity of CVE-2019-18805 is critical with a CVSS score of 9.8.

  • How does CVE-2019-18805 affect Linux Kernel?

    CVE-2019-18805 affects the Linux Kernel versions before 5.0.11.

  • What is the impact of CVE-2019-18805?

    CVE-2019-18805 can lead to a denial of service or possibly unspecified impact.

  • How can I fix CVE-2019-18805?

    To fix CVE-2019-18805, update your Linux Kernel to version 5.0.11 or later.

  • Where can I find more information about CVE-2019-18805?

    More information about CVE-2019-18805 can be found on the official Linux Kernel Git repository, Red Hat Bugzilla, and Red Hat Errata.

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