CVE-2020-25595
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Xen的MSI处理中的代码路径已经被识别出来，这些代码路径作用于从设备硬件寄存器读回的未消毒的值。虽然严格符合PCI规范的设备不应该影响这些寄存器，但设备有超出规范的后门操作。
Possible ATT&CK Techniques 1 AI
T1498.002 · Reflection Amplification
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I. Basic Information for CVE-2020-25595
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. The PCI passthrough code improperly uses register data. Code paths in Xen's MSI handling have been identified that act on unsanitized values read back from device hardware registers. While devices strictly compliant with PCI specifications shouldn't be able to affect these registers, experience shows that it's very common for devices to have out-of-spec "backdoor" operations that can affect the result of these reads. A not fully trusted guest may be able to crash Xen, leading to a Denial of Service (DoS) for the entire system. Privilege escalation and information leaks cannot be excluded. All versions of Xen supporting PCI passthrough are affected. Only x86 systems are vulnerable. Arm systems are not vulnerable. Only guests with passed through PCI devices may be able to leverage the vulnerability. Only systems passing through devices with out-of-spec ("backdoor") functionality can cause issues. Experience shows that such out-of-spec functionality is common; unless you have reason to believe that your device does not have such functionality, it's better to assume that it does.
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Xen的MSI处理中的代码路径已经被识别出来，这些代码路径作用于从设备硬件寄存器读回的未消毒的值。虽然严格符合PCI规范的设备不应该影响这些寄存器，但设备有超出规范的后门操作。
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 | - |
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II. Public POCs for CVE-2020-25595
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2020-25595 (2)
Mailing List Discussions for CVE-2020-25595 (4)
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http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00008.html vendor-advisory x_refsource_SUSE
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DA633Y3G5KX7MKRN4PFEGM3IVTJMBEOM/ vendor-advisory x_refsource_FEDORA
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4JRXMKEMQRQYWYEPHVBIWUEAVQ3LU4FN/ vendor-advisory x_refsource_FEDORA
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RJZERRBJN6E6STDCHT4JHP4MI6TKBCJE/ vendor-advisory x_refsource_FEDORA
Other References for CVE-2020-25595 (1)
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https://xenbits.xen.org/xsa/advisory-337.html x_refsource_MISC
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-2020-25603 | Xen 安全漏洞 | |
| 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-2020-25597 | Xen 缓冲区错误漏洞 |
Showing top 20 of 28 CVEs. View all on vendor page → →
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V. Comments for CVE-2020-25595
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