A vulnerability was found in IObit Smart Defrag 6. It has been declared as problematic. This vulnerability affects an unknown part in the library SmartDefragDriver.sys of the component Driver. The manipulation with an unknown input leads to a information disclosure vulnerability (Kernel). The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

SmartDefragDriver.sys (2.0) in IObit Smart Defrag 6 never frees an executable kernel pool that is allocated with user defined bytes and size when IOCTL 0x9C401CC0 is called. This kernel pointer can be leaked if the kernel pool becomes a "big" pool.

The bug was discovered 01/18/2019. The weakness was published 04/11/2019. This vulnerability was named CVE-2019-6493 since 01/18/2019. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability was handled as a non-public zero-day exploit for at least 83 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Productinfo

Vendor

• IObit

Name

• Smart Defrag

Version

• 6

License

• free

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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