Speedfan IOCTL privilege escalation
| speedfan-ioctl-privilege-escalation (37298) |  Medium Risk |
Description:
Speedfan could allow a local attacker to gain elevated privileges, caused by an error in the RDMSR and WRMSR IOCTL dispatch handlers for the Speedfan.sys driver. An attacker could exploit this vulnerability to load arbitrary unsigned system drivers, overwrite kernel memory, or gain elevated privileges.
*CVSS:
| Base Score: | 3 |
| Access Vector: | Local |
| Access Complexity: | Medium |
| Authentication: | Single |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | None |
| Temporal Score: | 2.7 |
| Exploitability: | Proof-of-Concept |
| Remediation Level: | Unavailable |
| Report Confidence: | Confirmed |
Consequences:
Gain Privileges
Remedy:
No remedy available as of July 9, 2011.
References:
- Almico's Bug Tracker: Bug ID 0000987: Speedfan.sys IOCTL Dispatch Handlers privilege escalation.
- Reverse Mode News Archive, Friday, 19 October 2007: Another 3rd party flaw to step into Vista Kernel.
- SpeedFan Web page: SpeedFan .
- BID-26123: SpeedFan Speedfan.sys Local Privilege Escalation Vulnerability
- CVE-2007-5633: Speedfan.sys in Alfredo Milani Comparetti SpeedFan 4.33, when used on Microsoft Windows Vista x64, allows local users to read or write arbitrary MSRs, and gain privileges and load unsigned drivers, via the (1) IOCTL_RDMSR 0x9C402438 and (2) IOCTL_WRMSR 0x9C40243C IOCTLs to \Device\speedfan, as demonstrated by an IOCTL_WRMSR action on MSR_LSTAR.
- SA27312: SpeedFan Speedfan.sys Privilege Escalation and Denial of Service
Platforms Affected:
- Alfredo Milani Comparetti SpeedFan 4.33
- Microsoft Windows Vista x64
Reported:
Oct 01, 2007
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