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CVE-2022-42316

Quick assessment

Affected
Xen xen
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（Cambridge）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 Xenstore存在安全漏洞，该漏洞源于恶意访客可以通过多种方式导致大量内存分配，最终导致拒绝服务(DoS)。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.25% · P17

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2022-42316

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Xenstore: guests can let run xenstored out of memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Malicious guests can cause xenstored to allocate vast amounts of memory, eventually resulting in a Denial of Service (DoS) of xenstored. There are multiple ways how guests can cause large memory allocations in xenstored: - - by issuing new requests to xenstored without reading the responses, causing the responses to be buffered in memory - - by causing large number of watch events to be generated via setting up multiple xenstore watches and then e.g. deleting many xenstore nodes below the watched path - - by creating as many nodes as allowed with the maximum allowed size and path length in as many transactions as possible - - by accessing many nodes inside a transaction
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（Cambridge）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 Xenstore存在安全漏洞，该漏洞源于恶意访客可以通过多种方式导致大量内存分配，最终导致拒绝服务(DoS)。
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
Xen xen consult Xen advisory XSA-326 -

II. Public POCs for CVE-2022-42316

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III. Intelligence Information for CVE-2022-42316

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Vendor Advisories for CVE-2022-42316 (1)

Mailing List Discussions for CVE-2022-42316 (3)

Other References for CVE-2022-42316 (2)

Same Patch Batch · Xen · 2022-11-01 · 19 CVEs total

CVE-2022-42319 Xen 安全漏洞
CVE-2022-42327 Xen 安全漏洞
CVE-2022-42326 Xen 安全漏洞
CVE-2022-42325 Xen 安全漏洞
CVE-2022-42324 Xen 缓冲区错误漏洞
CVE-2022-42323 Xen 安全漏洞
CVE-2022-42322 Xen 安全漏洞
CVE-2022-42321 Xen 安全漏洞
CVE-2022-42320 Xen 安全漏洞
CVE-2022-42309 Xen 安全漏洞
CVE-2022-42318 Xen 安全漏洞
CVE-2022-42317 Xen 安全漏洞
CVE-2022-42315 Xen 安全漏洞
CVE-2022-42314 Xen 安全漏洞
CVE-2022-42313 Xen 安全漏洞
CVE-2022-42312 Xen 安全漏洞
CVE-2022-42311 Xen 安全漏洞
CVE-2022-42310 Xen 安全漏洞

IV. Related Vulnerabilities

Same product: xen
Same vendor: Xen

V. Comments for CVE-2022-42316

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