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[Security Flaws] Severe flaws called "KRACK" are discovered in the WPA2 protocol

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[Security Flaws] Severe flaws called "KRACK" are discovered in the WPA2 protocol

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tplink

2017-10-17 11:29:42

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[Security Flaws] Severe flaws called "KRACK" are discovered in the WPA2 protocol

2017-10-17 11:29:42

Dear All,

On October 16th, 2017, an security researcher has disclosed some severe flaws in the WPA2 security protocol.

Description of the vulnerability
The vulnerability that known as "KRACK", short for Key Reinstallation Attack, will target the four-way handshake of the WPA2 protocol. Mathy Vanhoef, who published the flaw, said that the flaw may allow an attacker within the Wi-Fi range to decrypt network traffic from a WPA2-enabled device, hijack connections, and inject content into the traffic stream.
The publisher also points out that, the main attack is against the 4-way handshake, and does not exploit access points, but instead targets clients. So it might be that your router does not require security updates.
For more details, please refer to the below article published by Vanhoef:
https://www.krackattacks.com/

The following Common Vulnerabilities and Exposures (CVE) identifiers were assigned to track which products are affected by specific instantiations of the key reinstallation attack:CVE-2017-13077, CVE-2017-13078, CVE-2017-13079, CVE-2017-13080, CVE-2017-13081, CVE-2017-13082, CVE-2017-13084, CVE-2017-13086, CVE-2017-13087, CVE-2017-13088

TP-Link is aware of the vulnerabilities (KRACKs) in the WPA-2 protocol. We have published a security advisory on the official website and are working to solve the problems now.
Security Advisory: http://www.tp-link.com/en/faq-1970.html
[FONT=&]Software updates for the affected devices will be post at http://www.tp-link.com/support.html over the next few weeks.[/FONT]
Your network security is highly regarded by TP-Link.

Clarification for the WPA2 Vulnerabilities:
1. Please have a look at the article published by Mathy Vanhoef and pay attention to the QA listed at the end:
Q: What if there are no security updates for my router?
A: Our main attack is against the 4-way handshake, and does not exploit access points, but instead targets clients. So it might be that your router does not require security updates. We strongly advise you to contact your vendor for more details. In general though, you can try to mitigate attacks against routers and access points by disabling client functionality (which is for example used in repeater modes) and disabling 802.11r (fast roaming). For ordinary home users, your priority should be updating clients such as laptops and smartphones.

From the QA, we can get clear that the vulnerabilities only targets the devices act as Wi-Fi clients, including laptops, smartphones, range extenders working in RE mode, routers/gateways working in RE/WDS/WISP mode.
Thus if you're using the following TP-Link products:
(Unaffected Devices)
# All powerline adapters
# All mobile Wi-Fi products
# Routers and gateways working on default Router mode or Access Point mode
# Range extenders working in AP mode
You will not be affected by the WPA2 vulnerabilities. What you need to do is updating your Wi-Fi clients.

2. Conditions under which devices are vulnerable:
# Physical proximity: An attack can only happen when an attacker is in physical proximity to and within wireless range of your network.
# Time window: An attack can only happen when a client is connecting or reconnecting to a Wi-Fi network.

Devices affected by the vulnerability
Routers working in Repeater Mode/WISP Mode/Client Mode：

TL-WR940N with firmware version 3.17.1 Build 170717 Rel.55495n or earlier (Hardware Version 3.0 or earlier not affected)
[FONT=verdana]TL-WR841Nv13 with firmware version 0.9.1 4.16 v0348.0 Build 170814 Rel.59214n or earlier (Hardware Version 12.0 or earlier not affected)
TL-WR840N with firmware version 0.9.1 4.16 v019a.0 Build 170524 Rel.56478n or earlier (Hardware Version 2.0 or earlier not affected)
TL-WR941HP with firmware version 3.16.9 Build 20170116 Rel.50912n or earlier
TL-WR841HP with firmware version 3.16.9 Build 160612 Rel.67073n or earlier
TL-WR902AC with firmware version 3.16.9 Build 20160905 Rel.61455n or earlier
TL-WR802N with firmware version 0.9.1 3.16 v0188.0 Build 170705 Rel.34179n or earlier
TL-WR810N with firmware version 3.16.9 Build 160801 Rel.57365n or earlier
Routers with WDS function enabled (disabled by default) may be affected. Refer to the [COLOR=#0000ff]FAQ to learn how to check if WDS is enabled on your router.

Range Extenders working in Repeater Mode during a WPA2 handshake that is initiated only when connecting or reconnecting to a router:
TL-WA850RE with firmware version 1.0.0 Build 20170609 Rel.34153 or earlier
TL-WA855RE with firmware version 1.0.0 Build 20170609 Rel.36187 or earlier
TL-WA860RE with firmware version 1.0.0 Build 20170609 Rel.38491 or earlier
RE200 with firmware version 1.1.3 Build 20170818 Rel.58183 or earlier
RE210 with firmware version 3.14.2 Build 160623 Rel.43391n or earlier
RE305 with firmware version 1.0.0 Build 20170614 Rel.42952 or earlier
RE450 with firmware version 1.0.2 Build 20170626 Rel.60833 or earlier
RE500 with firmware version 1.0.1 Build20170210 Rel.59671 or earlier
RE650 with firmware version 1.0.2 Build 20170524 Rel.58598 or earlier

Wireless Adapters:
Archer T6E
Archer T9E

Whole Home Wi-Fi System:
Deco M5 with firmware version 1.1.5 Build 20170820 Rel.62483 or earlier

CPE/WBS/CAP:
CAP300 with firmware version 1.1.0 Build 20170601 Rel.60253 or earlier
CAP300-Outdoor with firmware version 1.1.0 Build 20170601 Rel.60212 or earlier
CAP1750 with firmware version 1.1.0 Build 20170601 Rel.60196 or earlier
CAP1200 with firmware version 1.0.0 Build 20170801 Rel.61314 or earlier
TL-ER604W with firmware version 1.2.0 Build 20160825 Rel.45880 or earlier
CPE520 with firmware version 2.1.6 Build 20170908 Rel.45234 or earlier
CPE610 with firmware version 2.1.5 Build 20170830 Rel. 58245 or earlier
CPE510 with firmware version 2.1.6 Build 20170908 Rel. 45233 or earlier
CPE220 with firmware version 2.1.6 Build 20170908 Rel. 45233 or earlier
CPE210 with firmware version 2.1.6 Build 20170908 Rel. 45234 or earlier
WBS210 with firmware version 2.1.0 Build 20170609 Rel. 57434 or earlier
WBS510 with firmware version 2.1.6 Build 20170908 Rel. 45234 or earlier

Smart home devices:
Smart Plugs and Switch: HS100，HS105，HS110，HS200
Smart Repeater with Plugs: RE350K，RE270K，RE370K
Cameras: NC250，NC260，NC450, KC120
[/FONT]
How to protect your devices
Until a software update is available to eliminate the vulnerability for your product, it is recommended to take the following precautions:
For wireless routers: Make sure your routers are in Router Mode or AP Mode, and patch the operating system of your smartphones, tablets and computers.
For wireless adapters: Patch the operating system of your computers.
Microsoft security update: Microsoft has fixed such security issues as mentioned in https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-13080

TP-Link has been working on affected models and will release firmware over the next few weeks on our official website.

Reversion History
2017-10-17: Initial release
2017-10-18: Updated some clarifications for the WPA2 vulnerabilities
2017-10-18: Updated the list of affected devices

149 Reply

Sitedrifter

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2017-10-19 02:30:58

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Registered: 2017-10-18

Re:[Security Flaws] Severe flaws called "KRACK" are discovered in the WPA2 protocol

2017-10-19 02:30:58

What a pile on top of TP-Link. Netgear has the same issue and they are 10 times the size of TP-Link and were notified well over a month ago and still don't have fixes. To all the people who will be dumping TP-Link, what manufacturer are you going to go to? I ask this because most of the comparable manufactures have the same issue. Maybe people should calm down and wait for fix instead of demanding something that is not an easy repair. Hell, Google is not going to release a fix for android or chrome devices until November. How many 100s of millions of Android phones are affected but Google will take it time? jump on their heads!

#52

dimon222

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2017-10-19 02:44:26

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Re:[Security Flaws] Severe flaws called "KRACK" are discovered in the WPA2 protocol

2017-10-19 02:44:26

About Android... LineageOS is already fixed in same day. About routers... Probably time to switch to Mikrotik.

#53

Sitedrifter

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2017-10-19 02:58:14

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Re:[Security Flaws] Severe flaws called "KRACK" are discovered in the WPA2 protocol

2017-10-19 02:58:14

Do you realize how obscure LineageOS is in regards to the 100s of millions of Android users? I would bet < .01 percent of the Android users do anything but use the OEM OS. My point being LineageOS is not a good comparison to make TP-Link look like they are sitting on their asses.

#54

13iron

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2017-10-19 03:51:27

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Re:[Security Flaws] Severe flaws called "KRACK" are discovered in the WPA2 protocol

2017-10-19 03:51:27

dimon222 wrote

About Android... LineageOS is already fixed in same day. About routers... Probably time to switch to Mikrotik.

unfamiliar with Mikrotik... why the recommendation? plz

#55

kleinbottle

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2017-10-19 09:35:59

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Re:[Security Flaws] Severe flaws called "KRACK" are discovered in the WPA2 protocol

2017-10-19 09:35:59

Mikrotik had a list of affected products and patch out on day 1. Their router OS is supposed to offer a lot of options for power users, too.

#56

kracker

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2017-10-19 09:40:11

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Re:[Security Flaws] Severe flaws called "KRACK" are discovered in the WPA2 protocol

2017-10-19 09:40:11

is2017 wrote

I think the biggest failing is lack of a security incident response process to address this issue in a timely manner and proper communication to customers. I posted similar points and received responses saying it's only a client side issue. As I mentioned, I will reserve judgment until I can test with an exploit kit. Now that they have released the list of effected devices, we can test on the other products that are not effected.

Security is a shared responsibility between end users and all of the manufactures of various devices. If there is a security issue, it needs to be addressed by everyone. This is my last post on this issue until I can test exploit kits against my tplink router.

Just published:

https://github.com/vanhoefm/krackattacks-test-ap-ft

Due to the published link, APs are only vulnerable to the attacks of key reinstallation in the Fast BSS transition (FT) handshake implemented by 802.11r.
As far as I known, tplink routers don't support the 802.11r roaming protocol. Thus how can you attack against your tplink router?

#57

Kolbeinn

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2017-10-19 10:10:54

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Re:[Security Flaws] Severe flaws called "KRACK" are discovered in the WPA2 protocol

2017-10-19 10:10:54

Thank you for sharing this useful post

#58

tplinkuser1212

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2017-10-19 13:20:34

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Re:[Security Flaws] Severe flaws called "KRACK" are discovered in the WPA2 protocol

2017-10-19 13:20:34

Is the access point ap500 affected of this problem? Can’t find anything on the support page. Please help. Thx

#59

vladdt

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2017-10-19 15:58:40

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Re:[Security Flaws] Severe flaws called "KRACK" are discovered in the WPA2 protocol

2017-10-19 15:58:40

This is the last TP-LINK device I will buy. They have a good hardware, but software is shit. My Archer VR900 v1 even not in the list. Thank you TP-LINK also for hidden shh server inside, we have no access. I understand, that you need to spy on everyone, but please - sell your devices only in China.

#60

WiFi-User

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2017-10-19 16:02:40

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Re:[Security Flaws] Severe flaws called "KRACK" are discovered in the WPA2 protocol

2017-10-19 16:02:40

Hi,

So reading the above can you confirm that No Access Point is affected? e.g. TP-LINK TL-WA801ND ?

Thanks.

#61

[Security Flaws] Severe flaws called "KRACK" are discovered in the WPA2 protocol

[Security Flaws] Severe flaws called "KRACK" are discovered in the WPA2 protocol

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