Microsoft Windows SMB Client Out-Of-Bounds Read Information Disclosure Vulnerability
Vulnerability Details
This vulnerability allows local attackers to disclose sensitive information on vulnerable installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the kernel-mode portion of the Windows SMB client. Crafted data in an SMB reply can trigger a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to escalate privilege to the level of 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-2018-8336
Disclosure Timeline
- 2018-05-24 - Vulnerability reported to vendor
- 2018-09-14 - Coordinated public release of advisory
- 2018-09-14 - Advisory Updated
Credit
Haikuo Xie of Baidu Security Lab
