GNU Wget: Header injection

Background

GNU Wget is a free software package for retrieving files using HTTP, HTTPS and FTP, the most widely-used Internet protocols.

Description

It was discovered that there was a header injection vulnerability in GNU Wget which allowed remote attackers to inject arbitrary HTTP headers via CRLF sequences in the host subcomponent of a URL.

Impact

A remote attacker could inject arbitrary HTTP headers in requests by tricking a user running GNU Wget into processing crafted URLs.

Workaround

There is no known workaround at this time.

Resolution

All GNU Wget users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-misc/wget-1.19.1-r1"