Did you update your router for the WPA2/PSK KRACK nonce re-use attack yet?

Did you update your router for the WPA2/PSK KRACK nonce re-use attack yet?
https://www.krackattacks.com

I reported it yesterday over here with links...
https://groups.google.com/forum/#!forum/alt.internet.wireless

They made it public a half hour ago:
https://groups.google.com/d/msg/alt.internet.wireless/vn8yRnm7UF8/N89Wcd_OAAAJ

Manufacturers apparently had 50 days to effect the fix:
Key Reinstallation Attacks: Forcing Nonce Reuse in WPA2
https://papers.mathyvanhoef.com/ccs2017.pdf

--
No need to respond; this is just FYI...

On Mon, 16 Oct 2017 12:46:08 +0000 (UTC), harry newton
wrote:

Did you update your router for the WPA2/PSK KRACK nonce re-use attack yet?
https://www.krackattacks.com

I reported it yesterday over here with links...
https://groups.google.com/forum/#!forum/alt.internet.wireless

They made it public a half hour ago:
https://groups.google.com/d/msg/alt.internet.wireless/vn8yRnm7UF8/N89Wcd_OAAAJ

Manufacturers apparently had 50 days to effect the fix:
Key Reinstallation Attacks: Forcing Nonce Reuse in WPA2
https://papers.mathyvanhoef.com/ccs2017.pdf

Kind of hard until the manufacturer says there is a fix.


KenW

He who is KenW said on Mon, 16 Oct 2017 07:36:14 -0600:

Kind of hard until the manufacturer says there is a fix.

I have Ubiquiti equipment where I've been in contact with them.

They already had the fix since they received notice 50 days ago.

But they told me this morning that they just received new information so
they're effecting a second fix as we speak.

The weaknesses are in the Wi-Fi standard itself, and not in individual
products or implementations.

Therefore, any correct implementation of WPA2 is likely affected. To
prevent the attack, users must update affected products as soon as security
updates become available.

If your device supports Wi-Fi, it is most likely affected.

Android, Linux, Apple, Windows, OpenBSD, MediaTek, Linksys, and others, are
all affected by some variant of the attacks.

The research behind the attack will be presented at the Computer and
Communications Security (CCS) conference, and at the Black Hat Europe
conference. Our detailed research paper can already be downloaded.

DEMONSTRATION
As a proof-of-concept we executed a key reinstallation attack against an
Android smartphone.

In this demonstration, the attacker is able to decrypt all data that the
victim transmits. For an attacker this is easy to accomplish, because our
key reinstallation attack is exceptionally devastating against Linux and
Android 6.0 or higher.

This is because Android and Linux can be tricked into (re)installing an
all-zero encryption key (see below for more info). When attacking other
devices, it is harder to decrypt all packets, although a large number of
packets can nevertheless be decrypted.

In any case, the following demonstration highlights the type of information
that an attacker can obtain when performing key reinstallation attacks
against protected Wi-Fi networks:

Any data or information that the victim transmits can be decrypted.

Additionally, depending on the device being used and the network setup, it
is also possible to decrypt data sent towards the victim (e.g. the content
of a website).

Although websites or apps may use HTTPS as an additional layer of
protection, we warn that this extra protection can (still) be bypassed in a
worrying number of situations. For example, HTTPS was previously bypassed
in non-browser software, in Apple's iOS and OS X, in Android apps, in
Android apps again, in banking apps, and even in VPN apps.

On 16-Oct-17 2:59 PM, harry newton wrote:
The weaknesses are in the Wi-Fi standard itself, and not in individual
products or implementations.

Therefore, any correct implementation of WPA2 is likely affected. To
prevent the attack, users must update affected products as soon as security
updates become available.

If your device supports Wi-Fi, it is most likely affected.
Android, Linux, Apple, Windows, OpenBSD, MediaTek, Linksys, and others, are
all affected by some variant of the attacks.
The research behind the attack will be presented at the Computer and
Communications Security (CCS) conference, and at the Black Hat Europe
conference. Our detailed research paper can already be downloaded.

DEMONSTRATION
As a proof-of-concept we executed a key reinstallation attack against an
Android smartphone.
In this demonstration, the attacker is able to decrypt all data that the
victim transmits. For an attacker this is easy to accomplish, because our
key reinstallation attack is exceptionally devastating against Linux and
Android 6.0 or higher.

This is because Android and Linux can be tricked into (re)installing an
all-zero encryption key (see below for more info). When attacking other
devices, it is harder to decrypt all packets, although a large number of
packets can nevertheless be decrypted.
In any case, the following demonstration highlights the type of information
that an attacker can obtain when performing key reinstallation attacks
against protected Wi-Fi networks:

Any data or information that the victim transmits can be decrypted.
Additionally, depending on the device being used and the network setup, it
is also possible to decrypt data sent towards the victim (e.g. the content
of a website).
Although websites or apps may use HTTPS as an additional layer of
protection, we warn that this extra protection can (still) be bypassed in a
worrying number of situations. For example, HTTPS was previously bypassed
in non-browser software, in Apple's iOS and OS X, in Android apps, in
Android apps again, in banking apps, and even in VPN apps.


FYI https://www.krackattacks.com/

--
David B.

He who is David_B said on Mon, 16 Oct 2017 15:13:58 +0100:

FYI https://www.krackattacks.com/

That link was already in the original post.

In cryptography, a nonce is a neologism for an arbitrary number that may
only be used once, similar in spirit to the occasionalism lexeme "nonce
word" (as are the headwords of any dictionary).

Here is a related link to the Blackhat briefing that wasn't in the OP:
https://www.blackhat.com/eu-17/briefings/schedule/#key-reinstallation-attacks-breaking-the-wpa2-protocol-8861

"We have discovered several key management vulnerabilities in the Wi-Fi
Protected Access II (WPA2) security protocol. These can be exploited using
so-called key reinstallation attacks.

Because this is a protocol-level issue, most correct implementations of the
standard are affected.

Put differently, most protected Wi-Fi networks, including personal and
enterprise WPA2 networks, are affected.

All clients and access points that we tested in practice were vulnerable to
some variant of the attack. The precise impact depends on the specific
variant(s) of the attack that an implementation is vulnerable to."

Bear in mind that the attacker has to be in close proximity to your device
to effect the attack, and that no known variants are in the wild yet, so
it's not something to worry about except to start looking for when the
patches come out for all your devices that handle the WiFi WPA2/PSK
protocol.

--
See also en.wikipedia.org/wiki/Cryptographic_nonce

On 16/10/2017 8:46 PM, harry newton wrote:
Did you update your router for the WPA2/PSK KRACK nonce re-use attack yet?
https://www.krackattacks.com

I reported it yesterday over here with links...
https://groups.google.com/forum/#!forum/alt.internet.wireless
...

Did you notice that these hacks always happen BEFORE someone fixed it?
Are they all security traps, planted into router firmware by design?

--
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/ v \ Simplicity is Beauty!
/( _ )\ May the Force and farces be with you!
^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3
�借貸! ��騙! ��交! �打交! �打劫! �自殺! 請考慮綜� (CSSA):
http://www.swd.gov.hk/tc/index/site_...sub_addressesa

He who is Mr. Man-wai Chang said on Mon, 16 Oct 2017 23:57:50 +0800:

Did you notice that these hacks always happen BEFORE someone fixed it?
Are they all security traps, planted into router firmware by design?

This nonce KRACK vulnerability is in *everything*, including smart phones
(iOS & Android) and computers (Mac/Windows/Linux) and routers
(Netgear/Cisco/TPLink) ....

It even affects web sites (e.g., Match.com)...

It's more than just routers, so it's *big* - but bear in mind
a. Fixes will be out soon
b. Nothing is known in the wild yet
c. You have to be nearby to be vulnerable

Still, since it affects *everything* using WPA2 (business and personal),
it's a big deal nonetheless.

All you can do is wait for the patch when it comes out for each of your
devices that implement the affected encryption protocol.

It appears if you do not use or have WiFi and WPS enabled you should be
secure from this. Since I have both disabled I assume I am safe because I
use neither.
---
Bill

Brought to you from Anchorage, Alaska

"harry newton" wrote in message
news
Did you update your router for the WPA2/PSK KRACK nonce re-use attack yet?
https://www.krackattacks.com

I reported it yesterday over here with links...
https://groups.google.com/forum/#!forum/alt.internet.wireless

They made it public a half hour ago:
https://groups.google.com/d/msg/alt.internet.wireless/vn8yRnm7UF8/N89Wcd_OAAAJ

Manufacturers apparently had 50 days to effect the fix:
Key Reinstallation Attacks: Forcing Nonce Reuse in WPA2
https://papers.mathyvanhoef.com/ccs2017.pdf

--
No need to respond; this is just FYI...

He who is Bill Bradshaw said on Mon, 16 Oct 2017 09:23:19 -0800:

It appears if you do not use or have WiFi and WPS enabled you should be
secure from this. Since I have both disabled I assume I am safe because I
use neither.

More so than routers, mostly all known wifi "clients" are affected (e.g.,
all consumer smartphones and computers) that use either WPA or WPA2
(enterprise or personal), and even against networks that just use AES.

Some encrypted web sites are also affected, such as Match.com (as shown in
the aforementioned video).

So you're right that it's not a big deal that there is no encryption in all
these cases because the the man in the middle has to be nearby.

On Mon, 16 Oct 2017 12:46:08 +0000 (UTC), harry newton wrote:

Did you update your router for the WPA2/PSK KRACK nonce re-use attack yet?
https://www.krackattacks.com

Still waiting for an update for my TP-Link Archer C7 router. If I
understand all this correctly, then I'll also need an update for my
Nexus 5X?

--
s|b

On 10/16/17 20:00, harry newton wrote:
He who is Bill Bradshaw said on Mon, 16 Oct 2017 09:23:19 -0800:

It appears if you do not use or have WiFi and WPS enabled you should
be secure from this.Â* Since I have both disabled I assume I am safe
because I use neither.

More so than routers, mostly all known wifi "clients" are affected (e.g.,
all consumer smartphones and computers) that use either WPA or WPA2
(enterprise or personal), and even against networks that just use AES.

Some encrypted web sites are also affected, such as Match.com (as shown in
the aforementioned video).

They do use a tool commonly used in man-in-the-middle attacks, to strip
away the tls and send the content to the client machine unencrypted. As
they did explain in the video, many don't check in their mobile devices
that they have tls communication or not and those they will be able to
carry out the attack to see the the login credentials in this example.

This has nothing to do with KRACK itself.


So you're right that it's not a big deal that there is no encryption in all
these cases because the the man in the middle has to be nearby.

There are devices that can give an attacker quite long range to execute
their attacks on, so you ain't safe just for you don't see anyone nearby.

--

//Aho

On 16-Oct-17 4:18 PM, harry newton wrote:
He who is David_B said on Mon, 16 Oct 2017 15:13:58 +0100:

FYI* https://www.krackattacks.com/

That link was already in the original post.

Oops! :-(

My apologies, Harry. Please forgive me.

In cryptography, a nonce is a neologism for an arbitrary number that may
only be used once, similar in spirit to the occasionalism lexeme "nonce
word" (as are the headwords of any dictionary).

Here is a related link to the Blackhat briefing that wasn't in the OP:
https://www.blackhat.com/eu-17/briefings/schedule/#key-reinstallation-attacks-breaking-the-wpa2-protocol-8861


"We have discovered several key management vulnerabilities in the Wi-Fi
Protected Access II (WPA2) security protocol. These can be exploited using
so-called key reinstallation attacks.

Because this is a protocol-level issue, most correct implementations of the
standard are affected.
Put differently, most protected Wi-Fi networks, including personal and
enterprise WPA2 networks, are affected.
All clients and access points that we tested in practice were vulnerable to
some variant of the attack. The precise impact depends on the specific
variant(s) of the attack that an implementation is vulnerable to."

Bear in mind that the attacker has to be in close proximity to your device
to effect the attack, and that no known variants are in the wild yet, so
it's not something to worry about except to start looking for when the
patches come out for all your devices that handle the WiFi WPA2/PSK
protocol.

Thanks for the additional info.

--
David B.

On 10/16/17 20:55, s|b wrote:
On Mon, 16 Oct 2017 12:46:08 +0000 (UTC), harry newton wrote:

Did you update your router for the WPA2/PSK KRACK nonce re-use attack yet?
https://www.krackattacks.com

Still waiting for an update for my TP-Link Archer C7 router. If I
understand all this correctly, then I'll also need an update for my
Nexus 5X?

It's more important to update the client than the server.

On 2017-10-16, s|b wrote:
On Mon, 16 Oct 2017 12:46:08 +0000 (UTC), harry newton wrote:

Did you update your router for the WPA2/PSK KRACK nonce re-use attack yet?
https://www.krackattacks.com

Still waiting for an update for my TP-Link Archer C7 router. If I
understand all this correctly, then I'll also need an update for my
Nexus 5X?


I think, but do not know for sure, that the primary thing that needs to
protected is the client not the Access point. Ie, your Android (do they
use wpa_supplicant, since Android is based on Linux?) IOs , or your
laptop.
As far as I have seen, there is no fix out yet for wpa_supplicant.

It seems that the reason Windows is more resistant is because they did
not no impliment the full spec for WPA2.