Published:
11 July 2003
Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2003.0483 -- CIAC Bulletin Number N-115
Buffer Overrun in Microsoft Windows Could Lead to Data Corruption
11 July 2003
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AusCERT Security Bulletin Summary
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Product: Microsoft Windows NT Server 4.0
Microsoft Windows NT Server 4.0, Terminal Server
Edition
Microsoft Windows 2000
Windows XP Professional
Publisher: CIAC
Impact: Execute Arbitrary Code/Commands
Denial of Service
Access Required: Existing Account
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The U.S. Department of Energy
Computer Incident Advisory Capability
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INFORMATION BULLETIN
Buffer Overrun in Microsoft Windows Could Lead to Data Corruption
[Microsoft Security Bulletin MS03-024]
July 10, 2003 17:00 GMT Number N-115
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PROBLEM: A flaw exists in the way that the server validates the
parameters of an SMB (Server Message Block) packet. The server
is not properly validating the buffer length established by the
packet. If the client specifies a buffer length that is less
than what is needed, it can cause the buffer to overrun.
SOFTWARE: * Microsoft Windows NT Server 4.0
* Microsoft Windows NT Server 4.0, Terminal Server Edition
* Microsoft Windows 2000
* Windows XP Professional
DAMAGE: By sending a specially crafted SMB packet request, an attacker
could cause a buffer overrun to occur. If exploited, this could
lead to data corruption, system failure, or in the worst case,
allow an attacker to run code of their choice.
SOLUTION: Apply patches as stated in Microsoft's security bulletin.
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VULNERABILITY The risk is MEDIUM. In order to exploit this vulnerability, an
ASSESSMENT: attacker would need a valid user account, and be authenticated
by the server prior to sending an SMB packet to it.
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LINKS:
CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/n-115.shtml
ORIGINAL BULLETIN:
http://www.microsoft.com/technet/treeview/default.asp?url=/technet/security/bulletin/MS03-024.asp
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