CVE-2022-42317

描述

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

如何修補 CVE-2022-42317

要修補 CVE-2022-42317,請將受影響套件升級到下列已修補版本。

• —升級至 4.15.4-r0 或更新版本
• —升級至 4.14.5+86-g1c354767d5-1 或更新版本

CVE-2022-42317 正在被利用嗎?

低 — EPSS 為 0.2%,目前沒有觀察到大規模利用活動。

受影響套件(2)

• from 0, < 4.15.4-r0
• from 0, < 4.14.5+86-g1c354767d5-1

CVSS 分數

參考連結(2)

• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2022-42317
• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2022-42317