I reported an insecure DKIM key to Deutsche Telekom / T-Systems.
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@dragonfrog @badkeys Most people might not be fluent in base64-encoded ASN.1, but a trained eye can see that it's the same key.
Hint: A sufficiently strong RSA key cannot possibly be that short, and you know it's a DER-encoded pubkey because it starts with "ME" and ends with "AQAB" (0x10001, common RSA public exponent)
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@dragonfrog @badkeys No, the private key was never published by t-systems, but it's so weak that it's very easy to crack. OP cracked and published the private key.
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@buherator @badkeys No, they thought they were generating an ECDSA key, for which a 256 or 384 bit would be strong. But, they didn't provide the right arguments, and wound up with RSA. I think the OP posted the private key that they were able to crack trivially.
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@dragonfrog @badkeys No, the private key was never published by t-systems, but it's so weak that it's very easy to crack. OP cracked and published the private key.
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I reported an insecure DKIM key to Deutsche Telekom / T-Systems. They first asked me to further explain things (not sure why 'Here's your DKIM private key' needs more explanation, but whatever...). Then they told me it's out of scope for their bugbounty.
I guess then there's really no reason not to tell you: They have a 384 bit RSA DKIM key configured at: dkim._domainkey.t-systems.nl
384 bit RSA is... how shall I put it? I think 512 bit is the lowest RSA key size that was ever really used. 384 bit RSA is crackable in a few hours on a modern PC (using cado-nfs). The private key is:
-----BEGIN RSA PRIVATE KEY-----
MIHxAgEAAjEAtTliQYV2Xvx1OGkDyOL799BTFEuobY2dn2AgtiKCQgrh78NVK1JK
j0yRXgNnPpGBAgMBAAECMF0t+TBZUCi8xATSMij7VLTxv5Xi5OIXesNiXOKtYIRP
LkpYfR5PggaMScfbmqSssQIZAMwOhm9d7Y7Qi7I2j1AlYbiqdtqO54T7FQIZAONa
9dJFkC6lM3EPXR+0SZ4dqwwpiM0nvQIYYgz8thi5JK264ohq9sTvnu9yKvUN9I09
AhgfgMYZKcxtujRjkSZtMzUUNLYzzDmJe90CGDKwqcBI0v9ChaR8WHht+/chMdxj
7ez94w==
-----END RSA PRIVATE KEY-----send an email coming from them.
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@momo @badkeys sadly this is being normalized today.
- #Microsoft literally demands people to self-d0x or they just silently drop all eMails, even replies to their customers.
- And OFC neither @BNetzA nor @EUCommission did anything about this.
@kkarhan @momo @badkeys @BNetzA @EUCommission Had the same issue just recently. I wonder how this can even be legal.
I wanted to ask a lawyer about this, but never came around doing so.
- #Microsoft literally demands people to self-d0x or they just silently drop all eMails, even replies to their customers.
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R relay@relay.mycrowd.ca shared this topic
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@badkeys You thought 384-bit was bad? I recently found a live, in daily use, 256-bit key in a, shall we say, large government entity that should know better (would rather not say much more publicly as its relevant to a paper under submission).
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I reported an insecure DKIM key to Deutsche Telekom / T-Systems. They first asked me to further explain things (not sure why 'Here's your DKIM private key' needs more explanation, but whatever...). Then they told me it's out of scope for their bugbounty.
I guess then there's really no reason not to tell you: They have a 384 bit RSA DKIM key configured at: dkim._domainkey.t-systems.nl
384 bit RSA is... how shall I put it? I think 512 bit is the lowest RSA key size that was ever really used. 384 bit RSA is crackable in a few hours on a modern PC (using cado-nfs). The private key is:
-----BEGIN RSA PRIVATE KEY-----
MIHxAgEAAjEAtTliQYV2Xvx1OGkDyOL799BTFEuobY2dn2AgtiKCQgrh78NVK1JK
j0yRXgNnPpGBAgMBAAECMF0t+TBZUCi8xATSMij7VLTxv5Xi5OIXesNiXOKtYIRP
LkpYfR5PggaMScfbmqSssQIZAMwOhm9d7Y7Qi7I2j1AlYbiqdtqO54T7FQIZAONa
9dJFkC6lM3EPXR+0SZ4dqwwpiM0nvQIYYgz8thi5JK264ohq9sTvnu9yKvUN9I09
AhgfgMYZKcxtujRjkSZtMzUUNLYzzDmJe90CGDKwqcBI0v9ChaR8WHht+/chMdxj
7ez94w==
-----END RSA PRIVATE KEY-----@badkeys
That was crackable with private entity resources decades ago.That's not even funny.
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I reported an insecure DKIM key to Deutsche Telekom / T-Systems. They first asked me to further explain things (not sure why 'Here's your DKIM private key' needs more explanation, but whatever...). Then they told me it's out of scope for their bugbounty.
I guess then there's really no reason not to tell you: They have a 384 bit RSA DKIM key configured at: dkim._domainkey.t-systems.nl
384 bit RSA is... how shall I put it? I think 512 bit is the lowest RSA key size that was ever really used. 384 bit RSA is crackable in a few hours on a modern PC (using cado-nfs). The private key is:
-----BEGIN RSA PRIVATE KEY-----
MIHxAgEAAjEAtTliQYV2Xvx1OGkDyOL799BTFEuobY2dn2AgtiKCQgrh78NVK1JK
j0yRXgNnPpGBAgMBAAECMF0t+TBZUCi8xATSMij7VLTxv5Xi5OIXesNiXOKtYIRP
LkpYfR5PggaMScfbmqSssQIZAMwOhm9d7Y7Qi7I2j1AlYbiqdtqO54T7FQIZAONa
9dJFkC6lM3EPXR+0SZ4dqwwpiM0nvQIYYgz8thi5JK264ohq9sTvnu9yKvUN9I09
AhgfgMYZKcxtujRjkSZtMzUUNLYzzDmJe90CGDKwqcBI0v9ChaR8WHht+/chMdxj
7ez94w==
-----END RSA PRIVATE KEY-----@badkeys@infosec.exchange oooofffff
But why would they turn down the bug bounty????
<img class="not-responsive emoji" src="https://content.mastodon.catgirl.cloud/custom_emojis/images/000/055/198/original/neocat_googly_shocked.png" title=":neocat_googly_shocked:" />
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I reported an insecure DKIM key to Deutsche Telekom / T-Systems. They first asked me to further explain things (not sure why 'Here's your DKIM private key' needs more explanation, but whatever...). Then they told me it's out of scope for their bugbounty.
I guess then there's really no reason not to tell you: They have a 384 bit RSA DKIM key configured at: dkim._domainkey.t-systems.nl
384 bit RSA is... how shall I put it? I think 512 bit is the lowest RSA key size that was ever really used. 384 bit RSA is crackable in a few hours on a modern PC (using cado-nfs). The private key is:
-----BEGIN RSA PRIVATE KEY-----
MIHxAgEAAjEAtTliQYV2Xvx1OGkDyOL799BTFEuobY2dn2AgtiKCQgrh78NVK1JK
j0yRXgNnPpGBAgMBAAECMF0t+TBZUCi8xATSMij7VLTxv5Xi5OIXesNiXOKtYIRP
LkpYfR5PggaMScfbmqSssQIZAMwOhm9d7Y7Qi7I2j1AlYbiqdtqO54T7FQIZAONa
9dJFkC6lM3EPXR+0SZ4dqwwpiM0nvQIYYgz8thi5JK264ohq9sTvnu9yKvUN9I09
AhgfgMYZKcxtujRjkSZtMzUUNLYzzDmJe90CGDKwqcBI0v9ChaR8WHht+/chMdxj
7ez94w==
-----END RSA PRIVATE KEY-----@networkexception Now I want T-Systems involved into Synapse Pro development. Have an ISP approved way when your matrix message "is not decryptable" to decrypt it after a few hours of compute time. It's not a bug, it's a feature they provide if their bug bounty rejects this.
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I reported an insecure DKIM key to Deutsche Telekom / T-Systems. They first asked me to further explain things (not sure why 'Here's your DKIM private key' needs more explanation, but whatever...). Then they told me it's out of scope for their bugbounty.
I guess then there's really no reason not to tell you: They have a 384 bit RSA DKIM key configured at: dkim._domainkey.t-systems.nl
384 bit RSA is... how shall I put it? I think 512 bit is the lowest RSA key size that was ever really used. 384 bit RSA is crackable in a few hours on a modern PC (using cado-nfs). The private key is:
-----BEGIN RSA PRIVATE KEY-----
MIHxAgEAAjEAtTliQYV2Xvx1OGkDyOL799BTFEuobY2dn2AgtiKCQgrh78NVK1JK
j0yRXgNnPpGBAgMBAAECMF0t+TBZUCi8xATSMij7VLTxv5Xi5OIXesNiXOKtYIRP
LkpYfR5PggaMScfbmqSssQIZAMwOhm9d7Y7Qi7I2j1AlYbiqdtqO54T7FQIZAONa
9dJFkC6lM3EPXR+0SZ4dqwwpiM0nvQIYYgz8thi5JK264ohq9sTvnu9yKvUN9I09
AhgfgMYZKcxtujRjkSZtMzUUNLYzzDmJe90CGDKwqcBI0v9ChaR8WHht+/chMdxj
7ez94w==
-----END RSA PRIVATE KEY-----@badkeys bad companies that don't pay out bug bounties can have uncoordinated public disclosure as a treat :3
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I reported an insecure DKIM key to Deutsche Telekom / T-Systems. They first asked me to further explain things (not sure why 'Here's your DKIM private key' needs more explanation, but whatever...). Then they told me it's out of scope for their bugbounty.
I guess then there's really no reason not to tell you: They have a 384 bit RSA DKIM key configured at: dkim._domainkey.t-systems.nl
384 bit RSA is... how shall I put it? I think 512 bit is the lowest RSA key size that was ever really used. 384 bit RSA is crackable in a few hours on a modern PC (using cado-nfs). The private key is:
-----BEGIN RSA PRIVATE KEY-----
MIHxAgEAAjEAtTliQYV2Xvx1OGkDyOL799BTFEuobY2dn2AgtiKCQgrh78NVK1JK
j0yRXgNnPpGBAgMBAAECMF0t+TBZUCi8xATSMij7VLTxv5Xi5OIXesNiXOKtYIRP
LkpYfR5PggaMScfbmqSssQIZAMwOhm9d7Y7Qi7I2j1AlYbiqdtqO54T7FQIZAONa
9dJFkC6lM3EPXR+0SZ4dqwwpiM0nvQIYYgz8thi5JK264ohq9sTvnu9yKvUN9I09
AhgfgMYZKcxtujRjkSZtMzUUNLYzzDmJe90CGDKwqcBI0v9ChaR8WHht+/chMdxj
7ez94w==
-----END RSA PRIVATE KEY-----@badkeys Telekom. Die machen das.
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@kkarhan @momo @badkeys @BNetzA @EUCommission Had the same issue just recently. I wonder how this can even be legal.
I wanted to ask a lawyer about this, but never came around doing so.
@Bebef @momo @badkeys Neither did I.
And the next-best qualified lawyer I'd know in that part is @wbs_legal.
- Sadly there's no legal precedent to establish the same "duty to deliver" as with #PostalOperators which ain't allowed to do anything unless explicitly instructed by the reciever or served a warrant by a judge.
- And obviously regulators like @BNetzA & @EUCommission likely ain't even aware of this issue since #ConsumerProtection doesn't apply to #SmallBusinesses!
- Sadly there's no legal precedent to establish the same "duty to deliver" as with #PostalOperators which ain't allowed to do anything unless explicitly instructed by the reciever or served a warrant by a judge.
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@kkarhan @momo @badkeys @BNetzA @EUCommission Had the same issue just recently. I wonder how this can even be legal.
I wanted to ask a lawyer about this, but never came around doing so.
@Bebef
It's probably not, some countries have really tough laws that they apply to email delivery and privacy that makes even spam filtering a legally dicey propositionBut let me put it like this, who wants to sue a company that has a legal budget bigger than the whole government budget of some of the poorer EU MS?
And in the end as long as the users won't start moving their fat posteriors away from the big tech monopolies, ...
@kkarhan @momo @badkeys @BNetzA @EUCommission -
I reported an insecure DKIM key to Deutsche Telekom / T-Systems. They first asked me to further explain things (not sure why 'Here's your DKIM private key' needs more explanation, but whatever...). Then they told me it's out of scope for their bugbounty.
I guess then there's really no reason not to tell you: They have a 384 bit RSA DKIM key configured at: dkim._domainkey.t-systems.nl
384 bit RSA is... how shall I put it? I think 512 bit is the lowest RSA key size that was ever really used. 384 bit RSA is crackable in a few hours on a modern PC (using cado-nfs). The private key is:
-----BEGIN RSA PRIVATE KEY-----
MIHxAgEAAjEAtTliQYV2Xvx1OGkDyOL799BTFEuobY2dn2AgtiKCQgrh78NVK1JK
j0yRXgNnPpGBAgMBAAECMF0t+TBZUCi8xATSMij7VLTxv5Xi5OIXesNiXOKtYIRP
LkpYfR5PggaMScfbmqSssQIZAMwOhm9d7Y7Qi7I2j1AlYbiqdtqO54T7FQIZAONa
9dJFkC6lM3EPXR+0SZ4dqwwpiM0nvQIYYgz8thi5JK264ohq9sTvnu9yKvUN9I09
AhgfgMYZKcxtujRjkSZtMzUUNLYzzDmJe90CGDKwqcBI0v9ChaR8WHht+/chMdxj
7ez94w==
-----END RSA PRIVATE KEY-----@badkeys This is the mastodon method of converting a private key into a public key. Scnr.
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R relay@relay.an.exchange shared this topic
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@Bebef
It's probably not, some countries have really tough laws that they apply to email delivery and privacy that makes even spam filtering a legally dicey propositionBut let me put it like this, who wants to sue a company that has a legal budget bigger than the whole government budget of some of the poorer EU MS?
And in the end as long as the users won't start moving their fat posteriors away from the big tech monopolies, ...
@kkarhan @momo @badkeys @BNetzA @EUCommission@yacc143 @Bebef @momo @badkeys @BNetzA @EUCommission Depends...
In #Germany, Corporations have to archive ALL #eMails in an automated, manipulation-proof manner with indexability (incl. attachments) for #Auditability purposes.
- That's why you get stuff like benno MailArchiv.
That being said the #cowardice of #regulators is appauling and if they ain't gonna do their job, they should vacate their positions and let others do it instead.
- I'd happily do this work!
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@Bebef
It's probably not, some countries have really tough laws that they apply to email delivery and privacy that makes even spam filtering a legally dicey propositionBut let me put it like this, who wants to sue a company that has a legal budget bigger than the whole government budget of some of the poorer EU MS?
And in the end as long as the users won't start moving their fat posteriors away from the big tech monopolies, ...
@kkarhan @momo @badkeys @BNetzA @EUCommission@Bebef
The really odd thing is it's not the oldies that nowadays are a problem, it's the youngsters, we literally had a complaint today about the PIM/office suite we use, our CEO nicely played that one. He's open to all proposals for alternatives from a company headquartered in the EEA for legal reasons.Interestingly the C level has no problem IMAP, and accessing the calendar over CalDAV. But the youngsters have never heard of these @kkarhan @momo @badkeys @BNetzA @EUCommission
