Title: Computer Associates BrightStor ARCserve Backup LGSERVER.EXE Denial Of Service Vulnerability
Severity: MODERATE
Description:
Computer Associates BrightStor ARCserve Backup products provide backup and restore protection for Windows, NetWare, Linux, and UNIX servers as well as Windows, Mac OS X, Linux, UNIX, AS/400, and VMS clients.
The application is prone to a denial-of-service vulnerability because it mishandles unexpected user-supplied input.
Specifically, the vulnerability resides in the 'LGSERVER.EXE' service. An attacker may exploit this issue by attempting to authenticate to the affected service, manipulating the third negotiation packet at address 0x15 - 0x18 (DWORD) to include the '0xff 0xff 0xff 0x7f' (DWORD) value. This causes the service to stop responding while writing a '.USX' file unusually large to 'D:\CA_BABLDdata\Server\data\transfer' containing 2,096,153KB (2GB) NULL bytes. This file will have the format 'RWXXX.usx' where X is 0-9 or A-F.
A remote attacker may exploit this issue to cause the affected service to stop responding or to exhaust available file-storage resources over time, resulting in denial-of-service conditions.
Affected Products:
- Computer Associates ARCserve Backup for Laptops and Desktops 11.0
- Computer Associates ARCserve Backup for Laptops and Desktops 11.1
- Computer Associates ARCserve Backup for Laptops and Desktops 11.1 SP1
- Computer Associates Business Protection Suite 2.0
- Computer Associates Business Protection Suite for Microsoft SBS Pre ed r2
- Computer Associates Business Protection Suite for Microsoft SBS Std Ed r2
- Computer Associates Desktop Management Suite 11.0
- Computer Associates Desktop Management Suite 11.1
- Computer Associates Desktop Protection Suite 2.0
References:
- Computer Associates: BrightStor ARCserve Backup Product Page
- Computer Associates: Important Security Notice for BrightStor ARCserve Backup for Laptops & Desktops
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