x86/AMD：调试掩码处理 (CVE-2023-34327)

CVE编号

CVE-2023-34327

利用情况

暂无

补丁情况

N/A

披露时间

2024-01-06

漏洞描述

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] AMD CPUs since ~2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions. Unfortunately there are errors in Xen's handling of the guest state, leading to denials of service. 1) CVE-2023-34327 - An HVM vCPU can end up operating in the context of a previous vCPUs debug mask state. 2) CVE-2023-34328 - A PV vCPU can place a breakpoint over the live GDT. This allows the PV vCPU to exploit XSA-156 / CVE-2015-8104 and lock up the CPU entirely.

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://xenbits.xenproject.org/xsa/advisory-444.html

受影响软件情况

#	类型	厂商	产品	版本	影响面
1
	运行在以下环境
	系统	alpine_3.15	xen	*		Up to (excluding) 4.15.5-r3
	运行在以下环境
	系统	alpine_3.16	xen	*		Up to (excluding) 4.16.5-r3
	运行在以下环境
	系统	alpine_3.17	xen	*		Up to (excluding) 4.16.5-r3
	运行在以下环境
	系统	alpine_3.18	xen	*		Up to (excluding) 4.17.2-r3
	运行在以下环境
	系统	alpine_3.19	xen	*		Up to (excluding) 4.17.2-r3
	运行在以下环境
	系统	debian_12	xen	*		Up to (excluding) 4.17.2+76-ge1f9cb16e2-1~deb12u1
	运行在以下环境
	系统	fedora_37	xen	*		Up to (excluding) 4.16.5-3.fc37
	运行在以下环境
	系统	fedora_38	xen	*		Up to (excluding) 4.17.2-4.fc38
	运行在以下环境
	系统	fedora_39	xen	*		Up to (excluding) 4.17.2-4.fc39
	运行在以下环境
	系统	opensuse_5.3	xen-libs	*		Up to (excluding) 4.16.5_08-150400.4.40.1
	运行在以下环境
	系统	opensuse_5.4	xen-libs	*		Up to (excluding) 4.16.5_08-150400.4.40.1
	运行在以下环境
	系统	opensuse_Leap_15.4	xen	*		Up to (excluding) 4.16.5_06-150400.4.37.1
	运行在以下环境
	系统	opensuse_Leap_15.5	xen	*		Up to (excluding) 4.17.2_06-150500.3.12.1
	运行在以下环境
	系统	suse_12_SP5	xen	*		Up to (excluding) 4.12.4_40-3.97.1

CVSS3评分 N/A

• 攻击路径 N/A
• 攻击复杂度 N/A
• 权限要求 N/A
• 影响范围 N/A
• 用户交互 N/A
• 可用性 N/A
• 保密性 N/A
• 完整性 N/A

N/A

CWE-ID	漏洞类型

Exp相关链接

- avd.aliyun.com