Microsoft Windows Font Integer Overflow Privilege Escalation Vulnerability
Vulnerability Details
This vulnerability allows local attackers to escalate privileges 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 rendering of fonts. A crafted OpenType font rendered by the kernel can trigger an integer overflow before writing to memory. An attacker can leverage this vulnerability to escalate privileges and execute code as 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-2018-1008
Disclosure Timeline
- 2018-01-30 - Vulnerability reported to vendor
- 2018-04-11 - Coordinated public release of advisory
- 2018-04-11 - Advisory Updated
Credit
Haikuo Xie and Zheng Huang of Baidu Security Lab
