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CVE-2020-25603

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 4.14版本及之前版本中存在安全漏洞。该漏洞源于在访问/分配事件通道时缺少内存屏障。

AI Predicted 7.8 Difficulty: Hard EPSS 0.41% · P33
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I. Basic Information for CVE-2020-25603

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 4.14.x. There are missing memory barriers when accessing/allocating an event channel. Event channels control structures can be accessed lockless as long as the port is considered to be valid. Such a sequence is missing an appropriate memory barrier (e.g., smp_*mb()) to prevent both the compiler and CPU from re-ordering access. A malicious guest may be able to cause a hypervisor crash resulting in a Denial of Service (DoS). Information leak and privilege escalation cannot be excluded. Systems running all versions of Xen are affected. Whether a system is vulnerable will depend on the CPU and compiler used to build Xen. For all systems, the presence and the scope of the vulnerability depend on the precise re-ordering performed by the compiler used to build Xen. We have not been able to survey compilers; consequently we cannot say which compiler(s) might produce vulnerable code (with which code generation options). GCC documentation clearly suggests that re-ordering is possible. Arm systems will also be vulnerable if the CPU is able to re-order memory access. Please consult your CPU vendor. x86 systems are only vulnerable if a compiler performs re-ordering.
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 4.14版本及之前版本中存在安全漏洞。该漏洞源于在访问/分配事件通道时缺少内存屏障。
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-2020-25603

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III. Intelligence Information for CVE-2020-25603

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Vendor Advisories for CVE-2020-25603 (2)

Mailing List Discussions for CVE-2020-25603 (4)

Other References for CVE-2020-25603 (1)

Same Patch Batch · n/a · 2020-09-23 · 28 CVEs total

CVE-2020-25739 Ruby 跨站脚本漏洞
CVE-2020-14370 Docker 信息泄露漏洞
CVE-2020-25821 peg-markdown 代码问题漏洞
CVE-2020-25826 Windows PingID 安全漏洞
CVE-2020-14365 Red Hat Ansible 数据伪造问题漏洞
CVE-2020-10714 Red Hat WildFly Elytron 授权问题漏洞
CVE-2020-10687 Red Hat Undertow 环境问题漏洞
CVE-2020-7122 Aruba CX Switches 缓冲区错误漏洞
CVE-2020-7121 Aruba CX 交换机 缓冲区错误漏洞
CVE-2020-24624 HPE Pay 路径遍历漏洞
CVE-2020-24625 HPE Pay 路径遍历漏洞
CVE-2020-24626 HPE Pay 路径遍历漏洞
CVE-2020-16244 APM Classic 安全漏洞
CVE-2020-16240 GE APM Classic 安全漏洞
CVE-2020-25596 Xen 注入漏洞
CVE-2020-24213 YGOPro ygocore 输入验证错误漏洞
CVE-2020-5783 IgniteNet HeliOS GLinq 跨站请求伪造漏洞
CVE-2020-5782 IgniteNet HeliOS GLinq 输入验证错误漏洞
CVE-2020-5781 IgniteNet HeliOS GLinq 跨站脚本漏洞
CVE-2020-25595 Xen 安全漏洞

Showing top 20 of 28 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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Same vendor: n/a

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