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Debian DSA-3062-1 Warning: Mitigation for Wget Symlink Attack Released

debian
Calendar Grey November 2, 2014
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Explore the ways in which Debian addresses vulnerabilities in wget related to symlink threats, bolstering protections against unauthorized file generation and remote command execution.
HD Moore of Rapid7 discovered a symlink attack in Wget, a command-line utility to retrieve files via HTTP, HTTPS, and FTP

Summary

HD Moore of Rapid7 discovered a symlink attack in Wget, a command-line
utility to retrieve files via HTTP, HTTPS, and FTP. The vulnerability
allows to create arbitrary files on the user's system when Wget runs in
recursive mode against a malicious FTP server. Arbitrary file creation
may override content of user's files or permit remote code execution with
the user privilege.

This update changes the default setting in Wget such that it no longer
creates local symbolic links, but rather traverses them and retrieves the
pointed-to file in such a retrieval.

For the stable distribution (wheezy), this problem has been fixed in
version 1.13.4-3+deb7u2.

For the unstable distribution (sid), this problem has been fixed in
version 1.16-1.

We recommend that you upgrade your wget packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/



Severity
important
Lowest
Low
Medium
High
Critical

Package: wget
CVE ID: CVE-2014-4877

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