Update index.md
This commit is contained in:
parent
323704ca81
commit
51f7b66db0
4
index.md
4
index.md
|
@ -66,7 +66,7 @@ I have seen mainly two vulnerable configurations of email forwarders
|
||||||
In this case forwarders modifies the From field(or any other field which is included in `h=` tag of the original DKIM signature) in the message header and adds additional DKIM signatures.
|
In this case forwarders modifies the From field(or any other field which is included in `h=` tag of the original DKIM signature) in the message header and adds additional DKIM signatures.
|
||||||
|
|
||||||
When any of the fields in `h=` tag is modified the original DKIM signature becomes invalid.
|
When any of the fields in `h=` tag is modified the original DKIM signature becomes invalid.
|
||||||
|
In below explanation `receiver@forwarder.com forwards to receiver@gmail.com`
|
||||||
|
|
||||||
Sender Sends to Forwarder (sender@gmail.com)
|
Sender Sends to Forwarder (sender@gmail.com)
|
||||||
```
|
```
|
||||||
|
@ -75,7 +75,7 @@ To : receiver@forwarder.com
|
||||||
DKIM-Signature : v=1; a=rsa-sha256; c=relaxed/relaxed;d=gmail.com;b=<signature>
|
DKIM-Signature : v=1; a=rsa-sha256; c=relaxed/relaxed;d=gmail.com;b=<signature>
|
||||||
```
|
```
|
||||||
|
|
||||||
Receiver Receives (receiver@yahoo.com)
|
Receiver Receives (receiver@gmail.com)
|
||||||
```
|
```
|
||||||
From : "sender@gmail.com" <mail-forwarder@forwarder.com>
|
From : "sender@gmail.com" <mail-forwarder@forwarder.com>
|
||||||
To : receiver@forwarder.com
|
To : receiver@forwarder.com
|
||||||
|
|
Loading…
Reference in New Issue