阿里云漏洞库

[This CNA information record relates to multiple CVEs; the

text explains which aspects/vulnerabilities correspond to which CVE.]

libfsimage contains parsing code for several filesystems, most of them based on

grub-legacy code. libfsimage is used by pygrub to inspect guest disks.

Pygrub runs as the same user as the toolstack (root in a priviledged domain).

At least one issue has been reported to the Xen Security Team that allows an

attacker to trigger a stack buffer overflow in libfsimage. After further

analisys the Xen Security Team is no longer confident in the suitability of

libfsimage when run against guest controlled input with super user priviledges.

In order to not affect current deployments that rely on pygrub patches are

provided in the resolution section of the advisory that allow running pygrub in

deprivileged mode.

CVE-2023-4949 refers to the original issue in the upstream grub

project ("An attacker with local access to a system (either through a

disk or external drive) can present a modified XFS partition to

grub-legacy in such a way to exploit a memory corruption in grub’s XFS

file system implementation.") CVE-2023-34325 refers specifically to

the vulnerabilities in Xen's copy of libfsimage, which is decended

from a very old version of grub.

建议您更新当前系统或软件至最新版，完成漏洞的修复。

参考链接
https://xenbits.xenproject.org/xsa/advisory-443.html

CWE-ID	漏洞类型
CWE-787	跨界内存写