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CVE-2018-12891

Quick assessment

Affected
n/a n/a
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Xen是英国剑桥大学开发的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。 Xen 4.10.x及之前版本（32位系统）中存在安全漏洞。攻击者可利用该漏洞造成拒绝服务。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.43% · P36
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I. Basic Information for CVE-2018-12891

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An issue was discovered in Xen through 4.10.x. Certain PV MMU operations may take a long time to process. For that reason Xen explicitly checks for the need to preempt the current vCPU at certain points. A few rarely taken code paths did bypass such checks. By suitably enforcing the conditions through its own page table contents, a malicious guest may cause such bypasses to be used for an unbounded number of iterations. A malicious or buggy PV guest may cause a Denial of Service (DoS) affecting the entire host. Specifically, it may prevent use of a physical CPU for an indeterminate period of time. All Xen versions from 3.4 onwards are vulnerable. Xen versions 3.3 and earlier are vulnerable to an even wider class of attacks, due to them lacking preemption checks altogether in the affected code paths. Only x86 systems are affected. ARM systems are not affected. Only multi-vCPU x86 PV guests can leverage the vulnerability. x86 HVM or PVH guests as well as x86 single-vCPU PV ones cannot leverage the vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Xen 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Xen是英国剑桥大学开发的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。 Xen 4.10.x及之前版本（32位系统）中存在安全漏洞。攻击者可利用该漏洞造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- n/a n/a -

II. Public POCs for CVE-2018-12891

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III. Intelligence Information for CVE-2018-12891

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Vendor Advisories for CVE-2018-12891 (4)

Mailing List Discussions for CVE-2018-12891 (2)

Other References for CVE-2018-12891 (2)

Same Patch Batch · n/a · 2018-07-02 · 48 CVEs total

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CVE-2018-13049 GLPI SQL注入漏洞
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CVE-2018-13056 ZZCMS 安全漏洞
CVE-2018-12499 Motorola MBP853 安全漏洞
CVE-2018-12528 Intex N150设备安全漏洞
CVE-2018-10075 ZOHO ManageEngine EventLog Analyzer 跨站脚本漏洞
CVE-2018-9276 Paessler PRTG Network Monitor 操作系统命令注入漏洞
CVE-2018-13067 OpenCart 跨站请求伪造漏洞
CVE-2018-13066 libming 安全漏洞
CVE-2018-12896 Linux kernel 数字错误漏洞
CVE-2018-12893 Xen 安全漏洞
CVE-2018-12892 Xen 安全漏洞
CVE-2018-12426 WordPress WP Live Chat Support Pro插件安全漏洞
CVE-2018-13092 Reimburse Token 数字错误漏洞

Showing top 20 of 48 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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Same vendor: n/a

V. Comments for CVE-2018-12891

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