Microsoft Windows SMB Client Improper Initialization Denial of Service Vulnerability
Vulnerability Details
This vulnerability allows remote attackers to deny service to vulnerable installations of Microsoft Windows. In some cases, user interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file, but attack vectors may vary depending on the implementation.
The specific flaw exists within the mrxsmb.sys driver. The issue results from the lack of proper initialization of a pointer prior to accessing it. An attacker can leverage this vulnerability to deny access to the target system.
Additional Details
Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0833
Disclosure Timeline
- 2017-12-01 - Vulnerability reported to vendor
- 2018-02-21 - Coordinated public release of advisory
- 2018-02-21 - Advisory Updated
Credit
Nabeel Ahmed and Eric Schayes from Dimension Data
