Token ring denial of service attack blue screen system
| token-ring-dos (1399) |  Medium Risk |
Description:
Windows NT workstations and servers on a source-routed token ring network are vulnerable to a denial of service attack. If an attacker creates multiple address resolution protocol (ARP) request frames that contain more than the legal amount of Token Ring source routing information, then Windows NT will blue screen with a 0xA error. This problem may also occur if a source routing bridge does not discard frames with invalid routing information (RI) fields.
Consequences:
Denial of Service
Remedy:
Contact Microsoft Support to obtain a hot fix for this vulnerability. See References.
References:
- Microsoft Knowledge Base Article 179157: Stop 0xA in Tcpip.sys When Token Ring Source Routing Data Exceeds 18 Bytes.
- Microsoft Product Support Services: Windows NT Service Packs.
- Nomad Mobile Research Centre Advisory: Lame NT Token Ring DoS.
- CVE-1999-1132: Windows NT 4.0 allows remote attackers to cause a denial of service (crash) via extra source routing data such as (1) a Routing Information Field (RIF) field with a hop count greater than 7, or (2) a list containing duplicate Token Ring IDs.
Platforms Affected:
- Microsoft Windows NT 4.0 Terminal Server
- Microsoft Windows NT 4.0
Reported:
Sep 30, 1998
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