Microsoft SFU NFS denial of service
| sfu-nfs-dos (6882) |  Medium Risk |
Description:
Microsoft Services for Unix (SFU) is vulnerable to a denial of service attack, caused by memory leak in the NFS (Network File System) service. Microsoft SFU is an add-on package that is used to integrate Windows computers into an existing Unix environment. A remote attacker can send a specially-crafted request to the NFS service to consume the kernel memory, which causes the system to fail. The system must be restarted to regain normal functionality.
Platforms Affected:
- Microsoft, Windows Services for UNIX 2.0
Remedy:
Apply the appropriate patch for your system, as listed in Microsoft Security Bulletin MS02-004. See References.
Microsoft originally provided a patch for this vulnerability in MS01-039, but it has been superseded with the patch released with MS02-004. See References.
Consequences:
Denial of Service
References:
- Microsoft Knowledge Base Article 294380, Denial-of-Service Attack with SFU 2.0 at http://support.microsoft.com/default.aspx?scid=kb;[LN];294380.
- Microsoft Security Bulletin MS01-039, Services for Unix 2.0 Telnet and NFS Services Contain Memory Leaks at http://www.microsoft.com/technet/security/bulletin/ms01-039.mspx.
- Microsoft Security Bulletin MS02-004, Unchecked Buffer in Telnet Server Could Lead to Arbitrary Code Execution at http://www.microsoft.com/technet/security/bulletin/ms02-004.mspx.
- BID-3089: Microsoft Services for Unix NFS DoS Vulnerability
- CVE-2001-0505: Multiple memory leaks in Microsoft Services for Unix 2.0 allow remote attackers to cause a denial of service (memory exhaustion) via a large number of malformed requests to (1) the Telnet service, or (2) the NFS service.
- US-CERT VU#581603: Microsoft Services for UNIX Network File System (NFS) server is vulnerable to denial of service via memory leak
- US-CERT VU#994851: Microsoft Services for UNIX Telnet server is vulnerable to denial of service via memory leak
Reported:
Jul 24, 2001
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