跳转到帖子

FreeBSD: VID-AB437561-47C0-11EE-8E38-002590C1F29C (CVE-2023-3494): FreeBSD -- bhyve privileged guest escape via fwctl

recommended_posts

发布于
  • Members

FreeBSD: VID-AB437561-47C0-11EE-8E38-002590C1F29C (CVE-2023-3494): FreeBSD -- bhyve privileged guest escape via fwctl

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
08/01/2023
Created
09/05/2023
Added
08/31/2023
Modified
01/28/2025

Description

The fwctl driver implements a state machine which is executed when a bhyve guest accesses certain x86 I/O ports.The interface lets the guest copy a string into a buffer resident in the bhyve process' memory.A bug in the state machine implementation can result in a buffer overflowing when copying this string. Malicious, privileged software running in a guest VM can exploit the buffer overflow to achieve code execution on the host in the bhyve userspace process, which typically runs as root, mitigated by the capabilities assigned through the Capsicum sandbox available to the bhyve process.

Solution(s)

  • freebsd-upgrade-base-13_1-release-p9
  • freebsd-upgrade-base-13_2-release-p2

References

  • CVE-2023-3494
  • 查看数 700
  • 已创建
  • 最后回复

参与讨论

你可立刻发布并稍后注册。 如果你有帐户,立刻登录发布帖子。
注意:你的帖子需要版主批准后才能看到。

游客
回帖…