Title: Microsoft Windows 2000 LDAP SSL Password Modification Vulnerability
Severity: CRITICAL
Description:
Lightweight Directory Access Protocol (LDAP) is a protocol used to access the Active Directory service. The Active Directory maintains information about network resources and users. It organizes and controls user's privileges to various network resources.
Due to inproper permissions verification, a normal user can successfully modify any user's Windows 2000 domain login password. This is accomplished if LDAP requests are being made over a SSL session.
The file containing the relevant user privilege information is 'chPwd.ldif'. A user could edit this file and modify the 'unicodePwd' attribute with the desired password. Once the password modify request function has been submitted, the user's domain password will be reset with the new one.
The vulnerable modify request function could be carried out by a non domain user via TCP port 636.
Successful exploitation of this vulnerability could be used to prohibit domain users from authenticating. In the event that the domain administrator's password is changed, a complete compromise of the host is possible.
Affected Products:
- Avaya DefinityOne Media Servers
- Avaya IP600 Media Servers
- Avaya S3400 Message Application Server
- Avaya S8100 Media Servers
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Advanced Server SP1
- Microsoft Windows 2000 Advanced Server SP2
- Microsoft Windows 2000 Datacenter Server
- Microsoft Windows 2000 Datacenter Server SP1
- Microsoft Windows 2000 Datacenter Server SP2
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Server SP1
- Microsoft Windows 2000 Server SP2
References:
- Entrigue Systems: McDonald finds Security Flaw in Windows 2000
- Microsoft: Microsoft Security Bulletin MS01-036
- Microsoft: Microsoft Security Bulletin MS02-016
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