Displaying 5 results from an estimated 5 matches for "dheater".
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2024 Jun 24
1
An Analysis of the DHEat DoS Against SSH in Cloud Environments
On 6/19/24 4:11 PM, Joseph S. Testa II wrote:
> On Wed, 2024-06-19 at 09:19 -0400, chris wrote:
>> real world example (current snapshot of portable on linux v. dheater)
>
> Thanks for this. However, much more extensive testing would be needed
> to show it is a complete solution. In my original research article, I
> used CPU idle time as the main metric. Also, I showed that very low-
> latency network links could bypass the existing countermeasu...
2024 Jun 19
1
An Analysis of the DHEat DoS Against SSH in Cloud Environments
...rcePenalties config directive been tested
> > against the DHEat attack?
>
> Not explicitly but those attacks would trigger the "grace-exceeded"
> path, so they should be detectable and penalisable.
>
> -d
real world example (current snapshot of portable on linux v. dheater)
Jun 19 09:09:47 server sshd-session[157401]: Connection reset by 10.0.0.1 port 45110 [preauth]
Jun 19 09:09:47 server sshd-session[157403]: Connection reset by 10.0.0.1 port 45116 [preauth]
Jun 19 09:09:47 server sshd-session[157405]: Connection reset by 10.0.0.1 port 45120 [preauth]
Jun 19 09:09...
2024 Jun 19
2
An Analysis of the DHEat DoS Against SSH in Cloud Environments
On Wed, 2024-06-19 at 09:19 -0400, chris wrote:
> real world example (current snapshot of portable on linux v. dheater)
Thanks for this. However, much more extensive testing would be needed
to show it is a complete solution. In my original research article, I
used CPU idle time as the main metric. Also, I showed that very low-
latency network links could bypass the existing countermeasures.
I suppose in the ne...
2025 Jan 02
1
[Bug 3771] New: Will future versions of openssh provide DDoS attack defense for the DH algorithm?:CVE-2024-41996
...nicate with DHE, and
the server must be configured to allow DHE and validate the order of
the public key.
Historically, there have also been some implementation flaws can
seriously affect the effectiveness of the D(HE)at attack, such as
CVE-2002-20001,CVE-2022-40735.
What will openssh do to avoid dheater?
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2024 Jun 19
1
An Analysis of the DHEat DoS Against SSH in Cloud Environments
On Tue, 18 Jun 2024, Joseph S. Testa II wrote:
> In the upcoming v9.8 release notes I see "the server will now block
> client addresses that repeatedly fail authentication, repeatedly
> connect without ever completing authentication or that crash the
> server." Has this new PerSourcePenalties config directive been tested
> against the DHEat attack?
Not explicitly but