对于 64 位 PV 来宾来说，顶级影子引用过早下降 (CVE-2023-34322)
CVE编号
CVE-2023-34322利用情况
暂无补丁情况
N/A披露时间
2024-01-06漏洞描述
For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. Since Xen itself needs to be mapped when PV guests run, Xen and shadowed PV guests run directly the respective shadow page tables. For 64-bit PV guests this means running on the shadow of the guest root page table. In the course of dealing with shortage of memory in the shadow pool associated with a domain, shadows of page tables may be torn down. This tearing down may include the shadow root page table that the CPU in question is presently running on. While a precaution exists to supposedly prevent the tearing down of the underlying live page table, the time window covered by that precaution isn't large enough.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-438.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-r1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.16 | xen | * | Up to (excluding) 4.16.5-r1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.17 | xen | * | Up to (excluding) 4.16.5-r1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.18 | xen | * | Up to (excluding) 4.17.2-r1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.19 | xen | * | Up to (excluding) 4.17.2-r1 | |||||
| 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) 4.16.5-2.fc37 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_38 | xen | * | Up to (excluding) 4.17.2-2.fc38 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_39 | xen | * | Up to (excluding) 4.17.2-2.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_04-150400.4.34.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.5 | xen | * | Up to (excluding) 4.17.2_04-150500.3.9.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | suse_12_SP5 | xen | * | Up to (excluding) 4.12.4_38-3.94.1 | |||||
- 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
| CWE-ID | 漏洞类型 |
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