CVE-2021-22922

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 Software

Name	Vendor	Start Version	End Version
Curl	Haxx	7.27.0 (including)	7.78.0 (excluding)
Red Hat Enterprise Linux 8	RedHat	curl-0:7.61.1-18.el8_4.1	*
Red Hat Enterprise Linux 8.2 Extended Update Support	RedHat	curl-0:7.61.1-12.el8_2.3	*
Curl	Ubuntu	trusty	*
Curl	Ubuntu	upstream	*
Curl	Ubuntu	xenial	*

NVD	https://nvd.nist.gov/vuln/detail/CVE-2021-22922
CWE	https://cwe.mitre.org/data/definitions/840.html

Affected Software

References