Vulnerability identifier: #VU16783

Vulnerability risk: Low

CVSSv3.1: 3.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-20483

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
wget
Server applications / File servers (FTP/HTTP)

Vendor: GNU

Description

The vulnerability allows a local attacker to gain access to potentially sensitive information.

The vulnerability exists due to set_file_metadata in xattr.c stores a file's origin URL in the user.xdg.origin.url metadata attribute of the extended attributes of the downloaded file. A local attacker can read this attribute, as demonstrated by getfattr and obtain credentials contained in the URL.

Mitigation
Update to version 1.20.1.

Vulnerable software versions

wget: 1.5.3 - 1.20

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External links
http://git.savannah.gnu.org/cgit/wget.git/tree/NEWS
http://twitter.com/marcan42/status/1077676739877232640

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.