6.5 Medium

CVE-2021-22922 When curl is instructed to download content using the metalink feature, thecontents is verified against a hash…

Description

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.

Affected products and versions

Product	Affected versions	Fixed in
https://github.com/curl/curl	Versions not published
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1	3.1.0 → < 3.1.5	3.1.5
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1	3.1.0 → < 3.1.5	3.1.5
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1	3.1.0 → < 3.1.5	3.1.5