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CVE-2018-20483

7.8 · HIGH

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…

Published Dec 26, 2018CWE-200EPSS 0.66%

Overview

CVE-2018-20483 is a high-severity vulnerability. It was published on December 26, 2018 and has a CVSS 3.0 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.savannah.gnu.org/cgit/wget.git/tree/NEWSRefwww.securityfocus.com/bid/106358Refaccess.redhat.com/errata/RHSA-2019:3701Refsecurity.gentoo.org/glsa/201903-08Refsecurity.netapp.com/advisory/ntap-20190321-0002/Reftwitter.com/marcan42/status/1077676739877232640Refusn.ubuntu.com/3943-1/Refgit.savannah.gnu.org/cgit/wget.git/tree/NEWSRefwww.securityfocus.com/bid/106358Refaccess.redhat.com/errata/RHSA-2019:3701

How CyberStrike helps

Frequently asked questions

What is CVE-2018-20483?

CVE-2018-20483 is a high-severity vulnerability. It was published on December 26, 2018 and has a CVSS 3.0 base score of 7.8 (HIGH).

How severe is CVE-2018-20483?

This vulnerability has a CVSS 3.0 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2018-20483?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2018-20483?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-20483 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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