CVE-2018-20483 Information

Description

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.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

http://git.savannah.gnu.org/cgit/wget.git/tree/NEWS http://www.securityfocus.com/bid/106358 https://access.redhat.com/errata/RHSA-2019:3701 https://security.gentoo.org/glsa/201903-08 https://security.netapp.com/advisory/ntap-20190321-0002/ https://twitter.com/marcan42/status/1077676739877232640 https://usn.ubuntu.com/3943-1/ 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.

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8