set_file_metadata in xattr.c in GNU Wget before 1.20.1 stores a file’s origin URL in the user.xdg.origin.url metadata attribute of the extended attributes of the
downloaded file, which allows local users to obtain sensitive information (e.g., credentials contained in the URL) by reading this attribute, as demonstrated by getfattr.
This also applies to Referer information in the user.xdg.referrer.url metadata attribute. According to 2016-07-22 in the Wget ChangeLog, user.xdg.origin.url was
partially based on the behavior of fwrite_xattr in tool_xattr.c in curl.

Fixed In Version:

wget 1.20.1

References:

http://git.savannah.gnu.org/cgit/wget.git/tree/NEWS
https://nvd.nist.gov/vuln/detail/CVE-2018-20483

Patches:

Introduced by: https://git.savannah.gnu.org/cgit/wget.git/commit/?id=a933bdd31eee9c956a3b5cc142f004ef1fa94cb3 (v1.19)
http://git.savannah.gnu.org/cgit/wget.git/commit/?id=c125d24762962d91050d925fbbd9e6f30b2302f8
http://git.savannah.gnu.org/cgit/wget.git/commit/?id=3cdfb594cf75f11cdbb9702ac5e856c332ccacfa

(from redmine: issue id 9819, created on 2019-01-01, closed on 2019-01-09)

• Relations:
  • parent #9816 (closed)
• Changesets:
  • Revision 957b8a20 on 2019-01-08T12:29:43Z:

main/wget: security upgrade to 1.20.1 (CVE-2018-20483)

Fixes #9819