Title: Microsoft Windows Kerberos Denial Of Service Vulnerability
Severity: MODERATE
Description:
Microsoft Windows contains support for authentication using the Kerberos protocol. This protocol is used to authenticate users in an Active Directory domain.
Microsoft Windows is susceptible to a remote Kerberos denial of service vulnerability. By sending unspecified packets to the Kerberos service on TCP or UDP port 88, attackers may cause the affected service to crash.
The service will automatically be restarted after 60 seconds, so attackers would have to repeat the attack to maintain the denial of service condition.
This vulnerability allows remote attackers to crash the affected authentication service, denying further domain authentication to legitimate users. It should be noted that exploitation requires that attackers have valid logon credentials.
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 Advanced Server SP3
- Microsoft Windows 2000 Advanced Server SP4
- Microsoft Windows 2000 Datacenter Server
- Microsoft Windows 2000 Datacenter Server SP1
- Microsoft Windows 2000 Datacenter Server SP2
- Microsoft Windows 2000 Datacenter Server SP3
- Microsoft Windows 2000 Datacenter Server SP4
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Server SP1
- Microsoft Windows 2000 Server SP2
- Microsoft Windows 2000 Server SP3
- Microsoft Windows 2000 Server SP4
- Microsoft Windows Server 2003 Datacenter Edition
- Microsoft Windows Server 2003 Datacenter Edition Itanium
- Microsoft Windows Server 2003 Datacenter Edition Itanium SP1
- Microsoft Windows Server 2003 Datacenter Edition SP1
- Microsoft Windows Server 2003 Datacenter x64 Edition
- Microsoft Windows Server 2003 Enterprise Edition
- Microsoft Windows Server 2003 Enterprise Edition Itanium
- Microsoft Windows Server 2003 Enterprise Edition Itanium SP1
- Microsoft Windows Server 2003 Enterprise Edition SP1
- Microsoft Windows Server 2003 Enterprise x64 Edition
- Microsoft Windows Server 2003 Standard Edition
- Microsoft Windows Server 2003 Standard Edition SP1
- Microsoft Windows Server 2003 Standard x64 Edition
- Microsoft Windows Server 2003 Web Edition
- Microsoft Windows Server 2003 Web Edition SP1
References:
- Microsoft: Microsoft Security Bulletin MS05-042
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