WinPcap NPF.SYS bpf_filter_init() code execution
| winpcap-bpffilterinit-code-execution (38433) |  High Risk |
Description:
WinPcap could allow a local attacker to execute arbitrary code on the system, caused by an array indexing error in the bpf_filter_init() function in the NPF.SYS device driver. By sending a specially-crafted IOCTL request, an attacker could exploit this vulnerability to corrupt memory and execute arbitrary code on the system with kernel level privileges.
*CVSS:
| Base Score: | 7.2 |
| Access Vector: | Local |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | Complete |
| Integrity Impact: | Complete |
| Availability Impact: | Complete |
| Temporal Score: | 5.3 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Gain Privileges
Remedy:
Upgrade to the latest version of WinPcap (4.0.2 or later), available from the WinPcap Web site. See References.
References:
- iDefense Labs PUBLIC ADVISORY: 11.12.07: WinPcap NPF.SYS bpf_filter_init Arbitrary Array Indexing Vulnerability.
- WinPcap Web site: WinPcap, The Packet Capture and Network Monitoring Library for Windows.
- BID-26409: WinPcap NPF.SYS Bpf_Filter_Init Function Local Privilege Escalation Vulnerability
- CVE-2007-5756: Multiple array index errors in the bpf_filter_init function in NPF.SYS in WinPcap before 4.0.2, when run in monitor mode (aka Table Management Extensions or TME), and as used in Wireshark and possibly other products, allow local users to gain privileges via crafted IOCTL requests.
- SA27676: WinPcap NPF.SYS "bpf_filter_init" Array Indexing Vulnerability
- SECTRACK ID: 1018935: WinPcap Bug in bpf_filter_init() Function Lets Local Users Gain Kernel Level Privileges
- VUPEN/ADV-2007-3835: WinPcap NPF.SYS bpf_filter_init() Arbitrary Array Indexing Vulnerability
Platforms Affected:
- Microsoft Windows Vista
- Winpcap WinPcap 4.0.1
Reported:
Nov 12, 2007
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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.