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Moderately critical

MySQL Authentication Vulnerabilities

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Release Date:  2004-07-06    Last Update:  2004-07-13    Views:  19,889

Secunia Advisory SA12020

Where:

From local network

Impact:

Security Bypass, Privilege escalation

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


Chris Anley has reported two vulnerabilities in MySQL, allowing malicious people to gain access to the database or the local system.

1) MySQL fails to properly verify passwords if the client has set a specific client capability flag and specifies a "passwd_len" of NULL. This causes MySQL to accept a NULL password as a valid password and authenticates the user.

Successful exploitation requires that the attacker knows a valid username.

2) A boundary error within the handling of "scramble" strings can reportedly be exploited to execute arbitrary code if the attacker knows a password hash or through brute forcing.

The vulnerabilities only affect beta / developement branches of MySQL 4.1.x and MySQL 5.

NOTE: Secunia doesn't recommend installing beta and development software on production systems and doesn't normally issue advisories regarding such software. However, an exception has been made in this case due to the potential attention this issue may receive.


Solution:
MySQL production releases 3.x and 4.0.x are not affected.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Chris Anley, NGSSoftware.

Original Advisory:
http://www.nextgenss.com/advisories/mysql-authbypass.txt

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: MySQL Authentication Vulnerabilities

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