Shim：整数溢出导致 32 位系统上 verify_sbat_section 中的堆缓冲区溢出 (CVE-2023-40548)

CVE编号

CVE-2023-40548

利用情况

暂无

补丁情况

N/A

披露时间

2024-01-29

漏洞描述

A buffer overflow was found in Shim in the 32-bit system. The overflow happens due to an addition operation involving a user-controlled value parsed from the PE binary being used by Shim. This value is further used for memory allocation operations, leading to a heap-based buffer overflow. This flaw causes memory corruption and can lead to a crash or data integrity issues during the boot phase.

解决建议

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://access.redhat.com/security/cve/CVE-2023-40548
https://bugzilla.redhat.com/show_bug.cgi?id=2241782

CVSS3评分 4.9

• 攻击路径 本地
• 攻击复杂度 高
• 权限要求 无
• 影响范围 未更改
• 用户交互 无
• 可用性 低
• 保密性 低
• 完整性 低

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

CWE-ID	漏洞类型

Exp相关链接

- avd.aliyun.com