漏洞信息
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Vulnerability Title
varstored: TOCTOU issues with mapped guest memory
Vulnerability Description
varstored is a component of the Xapi toolstack handling UEFI Variables for a VM. It has a communication path with OVMF inside the VM involving mapping a buffer prepared by OVMF. Within varstored, there were insufficient compiler barriers, creating TOCTOU issues with data in the shared buffer. The exact vulnerable behaviour depends on the code generated by the compiler. In a build of varstored using default settings, the attacker can control an index used in a jump table.
CVSS Information
N/A
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Vulnerability Title
Xen varstored 竞争条件问题漏洞
Vulnerability Description
Xen varstored是Xen组织的一款虚拟化平台存储管理软件。 Xen varstored存在竞争条件问题漏洞,该漏洞源于编译器屏障不足,导致共享缓冲区中的数据存在TOCTOU问题,攻击者可以控制跳转表中使用的索引。
CVSS Information
N/A
Vulnerability Type
N/A