Microsoft Windows DNS client buffer overflow
| win-dns-client-bo (28013) |  High Risk |
Description:
Microsoft Windows is vulnerable to a buffer overflow in the DNS client service, caused by a length miscalculation when processing TXT, HINFO, X25, and ISDN records. By sending a specially-crafted DNS client request to an affected system client, a remote attacker could overflow a buffer and execute arbitrary code on the system.
Note: In order to exploit this vulnerability, the attacker would be required to be on a subnet between the host and DNS server or convince the host to make a DNS request to a malicious server.
*CVSS:
| Base Score: | 8 |
| Access Vector: | Remote |
| Access Complexity: | High |
| Authentication: | Not Required |
| Confidentiality Impact: | Complete |
| Integrity Impact: | Complete |
| Availability Impact: | Complete |
| Temporal Score: | 5.9 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Gain Access
Remedy:
Apply the appropriate patch for your system, as listed in Microsoft Security Bulletin MS06-041. See References.
References:
- Internet Security Systems Protection Advisory August 8, 2006: Microsoft DNS Client Integer Overflow Vulnerability.
- Microsoft Security Bulletin MS06-041: Vulnerabilities in DNS Resolution Could Allow Remote Code Execution (920683).
- US-CERT Technical Cyber Security Alert TA06-220A: Microsoft Windows, Office, and Internet Explorer Vulnerabilities.
- ASA-2006-154: Windows Security Updates for August 2006 - (MS06-040 - MS06-051)
- BID-19404: Microsoft Windows DNS Client Buffer Overrun Vulnerability
- CVE-2006-3441: Buffer overflow in the DNS Client service in Microsoft Windows 2000 SP4, XP SP1 and SP2, and Server 2003 SP1 allows remote attackers to execute arbitrary code via a crafted record response. NOTE: while MS06-041 implies that there is a single issue, there are multiple vectors, and likely multiple vulnerabilities, related to (1) a heap-based buffer overflow in a DNS server response to the client, (2) a DNS server response with malformed ATMA records, and (3) a length miscalculation in TXT, HINFO, X25, and ISDN records.
- SA21394: Windows DNS Resolution Code Execution Vulnerabilities
- SECTRACK ID: 1016653: Windows Winsock and DNS Client Buffer Overflows Let Remote Users Execute Arbitrary Code
- US-CERT VU#794580: Microsoft DNS Client buffer overflow
- VUPEN/ADV-2006-3211: Microsoft Windows Winsock Hostname and DNS Client Vulnerabilities (MS06-041)
Platforms Affected:
- Microsoft Windows 2000 SP4
- Microsoft Windows 2003
- Microsoft Windows 2003 Server SP1 Itanium
- Microsoft Windows 2003 Server x64
- Microsoft Windows 2003 Server Itanium
- Microsoft Windows 2003 Server SP1
- Microsoft Windows XP x64 Professional
- Microsoft Windows XP SP1
- Microsoft Windows XP SP2
Reported:
Aug 08, 2006
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For corrections or additions please email xforce@iss.net
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.