CVE-2018-20483

Impact:
Moderate
Public Date:
2018-12-26
CWE:
CWE-200
Bugzilla:
1662705: CVE-2018-20483 wget: Information exposure in set_file_metadata function in xattr.c

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2018-20483 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v3 metrics

NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.

CVSS3 Base Score 5.5
CVSS3 Base Metrics CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity Impact None
Availability Impact None

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 8 wget Not affected
Red Hat Enterprise Linux 8 curl Affected
Red Hat Enterprise Linux 7 wget Not affected
Red Hat Enterprise Linux 7 curl Will not fix
Red Hat Enterprise Linux 6 wget Not affected
Red Hat Enterprise Linux 6 curl Not affected
Red Hat Enterprise Linux 5 curl Not affected
Red Hat Enterprise Linux 5 wget Not affected
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.

Mitigation

wget users should pass credentials using the "--user/password" or the "--user/--ask-password" command line argument to wget or use --no-xattr to turn off saving extended attribute information. In curl downloading extended attributes is disabled by default.

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation