CVE-2018-5390 Linux kernel versions 4.9+ vulnerability

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Forums › LAN (ethernet/Wifi/routers/Bluetooth) › CVE-2018-5390 Linux kernel versions 4.9+ vulnerability

freitasm

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#239837 7-Aug-2018 10:17

I wonder how CVE-2018-5390 Linux kernel versions 4.9+ vulnerability would affect Linux-based consumer-grade routers in the wild... Not sure how many (if any) models are running affected version - but if any then I would be afraid.

@michaelmurfy do you know?

Aredwood

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#2069183 7-Aug-2018 10:22

The above vulnerability is a denial of service. So it at least isn't something that could allow a worm to appear.

freitasm

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#2069201 7-Aug-2018 10:52

Correct, but would annoy a lot of people.

My current router is not affected as it is running kernel 3.4...

michaelmurfy

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#2069234 7-Aug-2018 12:13

Very few routers (if any) will be using this and all routers planning to use this in the future will likely be using a patched version of the kernel. It is quite a new kernel.

My PC is running 4.9.0-7 and my Edgerouter is running 3.10.107-UBNT. The Alpha firmware I think does have 4.9 in testing but as this is an alpha it should be updated before the final build.

I don't think many others really run a later version of the Linux kernel - many appliances run FreeBSD / NetBSD or have older kernel versions.

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qwerty123

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#2069472 7-Aug-2018 18:42

Attack surfuce is pretty small. Maintaining the denial of service condition requires continuous two-way TCP sessions to a reachable open port. How often a consumer-grade router has a service running on it and exposed to the Internet? Forwarded traffic won't cause DoS.

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