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VID 14150
Severity 40
Port 23
Protocol TCP
Class TELNET
Detailed Description A denial of service vulnerability exists according to the Linux kernel information on the remote host.

- A flaw named SegmentSmack was found in the way the Linux kernel handled specially crafted TCP packets (CVE-2018-5390)

- A flaw named FragmentSmack was found in the way the Linux kernel handled reassembly of fragmented IPv4 and IPv6 packets. (CVE-2018-5391, CVE-2018-6922)

* References:
https://www.kb.cert.org/vuls/id/332928
https://www.ghostscript.com/doc/current/Use.htm#Safer
https://www.exploit-db.com/exploits/45243/?rss

* Platforms Affected:
Linux Kernel 4.9 or later 4.x versions
Linux Kernel 3.9 or later 3.x versions
Recommendation - Linux kernel installed manually
Apply the latest version by referring to the following.
https://www.kernel.org/

- Redhat
Apply the latest version by referring to the following.
https://access.redhat.com/articles/3553061
https://access.redhat.com/security/cve/cve-2018-5390
https://access.redhat.com/security/cve/cve-2018-5391

- Ubuntu :
Apply the latest version by referring to the following.
https://usn.ubuntu.com/
https://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-5390.html
https://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-5391.html
https://security-tracker.debian.org/tracker/CVE-2018-6922

- CentOS
Apply the latest version by referring to the following.
https://lists.centos.org/pipermail/centos-announce/2018-August/022984.html
https://lists.centos.org/pipermail/centos-announce/2018-August/022983.html
Related URL CVE-2018-5390,CVE-2018-5391,CVE-2018-6922 (CVE)
Related URL (SecurityFocus)
Related URL (ISS)