#VU12432 Cookie injection in wget - CVE-2018-0494

Vulnerability identifier: #VU12432

Vulnerability risk: Low

CVSSv4.0: 7.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2018-0494

CWE-ID: CWE-74

Exploitation vector: Network

Exploit availability: Yes

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

Vendor: GNU

Description
The vulnerability allows a remote attacker to write arbitrary files on the target system.

The weakness exists due to improper processing of Set-Cookie responses. A remote attacker can return specially crafted data and inject arbitrary cookies into the cookie jar file.

Mitigation
Update to version 1.19.5 or later.

Vulnerable software versions

wget: 1.17 - 1.19.4

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External links
https://sintonen.fi/advisories/gnu-wget-cookie-injection.txt

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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. However, proof of concept for this vulnerability is available.