CVE-2021-22922

描述

When curl is instructed to download content using the metalink feature, thecontents is verified against a hash provided in the metalink XML file.The metalink XML file points out to the client how to get the same contentfrom a set of different URLs, potentially hosted by different servers and theclient can then download the file from one or several of them. In a serial orparallel manner.If one of the servers hosting the contents has been breached and the contentsof the specific file on that server is replaced with a modified payload, curlshould detect this when the hash of the file mismatches after a completeddownload. It should remove the contents and instead try getting the contentsfrom another URL. This is not done, and instead such a hash mismatch is onlymentioned in text and the potentially malicious content is kept in the file ondisk.

如何修補 CVE-2021-22922

要修補 CVE-2021-22922,請將受影響套件升級到下列已修補版本。

• —升級至 7.78.0-r0 或更新版本

CVE-2021-22922 正在被利用嗎?

低 — EPSS 為 4.3%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• >= 7.27.0, < 7.78.0-r0

CVSS 分數

參考連結(1)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2021-22922