Date: Fri, 23 Jun 2000 18:29:00 -0400
From: bugzilla@REDHAT.COM
To: BUGTRAQ@SECURITYFOCUS.COM
Subject: [RHSA-2000:039-02] remote root exploit (SITE EXEC)
fixed
Red Hat, Inc. Security Advisory
Synopsis: remote root exploit (SITE EXEC) fixed
Advisory ID: RHSA-2000:039-02
Issue date: 2000-06-23
Updated on: 2000-06-23
Product: Red Hat Linux
Keywords: wu-ftpd, root exploit, site exec, buffer overrun
Cross references: N/A
1. Topic:
A security bug in wu-ftpd can permit remote users, even without
an account, to gain root access. The new version closes the
hole.
2. Relevant releases/architectures:
Red Hat Linux 5.2 – i386 alpha sparc
Red Hat Linux 6.2 – i386 alpha sparc
3. Problem description:
An exploitable buffer overrun existed in wu-ftpd code’s status
update code. Fixed by adding bounds checking by passing the status
strings through %s.
4. Solution:
For each RPM for your particular architecture, run:
rpm -Fvh [filename]
where filename is the name of the RPM.
5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla
for more info):
N/A
6. RPMs required:
Red Hat Linux 5.2:
i386:
ftp://updates.redhat.com/5.2/i386/wu-ftpd-2.6.0-2.5.x.i386.rpm
alpha:
ftp://updates.redhat.com/5.2/alpha/wu-ftpd-2.6.0-2.5.x.alpha.rpm
sparc:
ftp://updates.redhat.com/5.2/sparc/wu-ftpd-2.6.0-2.5.x.sparc.rpm
sources:
ftp://updates.redhat.com/5.2/SRPMS/wu-ftpd-2.6.0-2.5.x.src.rpm
Red Hat Linux 6.2:
i386:
ftp://updates.redhat.com/6.2/i386/wu-ftpd-2.6.0-14.6x.i386.rpm
alpha:
ftp://updates.redhat.com/6.2/alpha/wu-ftpd-2.6.0-14.6x.alpha.rpm
sparc:
ftp://updates.redhat.com/6.2/sparc/wu-ftpd-2.6.0-14.6x.sparc.rpm
sources:
ftp://updates.redhat.com/6.2/SRPMS/wu-ftpd-2.6.0-14.6x.src.rpm
7. Verification:
MD5 sum Package Name
e1f3b09d8ad0067fa7fd22e7afe77e64 5.2/SRPMS/wu-ftpd-2.6.0-2.5.x.src.rpm
7c2f89b3f8533ec54a36c5dde5995ce6 5.2/alpha/wu-ftpd-2.6.0-2.5.x.alpha.rpm
8dbd0b0f1fa1d0755393942cb4cb141d 5.2/i386/wu-ftpd-2.6.0-2.5.x.i386.rpm
5d9df2512a15e5c8914f398d980b12e7 5.2/sparc/wu-ftpd-2.6.0-2.5.x.sparc.rpm
67349a75b767585628912b840e52806e 6.2/SRPMS/wu-ftpd-2.6.0-14.6x.src.rpm
fafe870fc91762dd7e9182df3b4dfee5 6.2/alpha/wu-ftpd-2.6.0-14.6x.alpha.rpm
50c11f333641277ab75e6207bffb13b4 6.2/i386/wu-ftpd-2.6.0-14.6x.i386.rpm
8abba6ffa660d1c221581855630ed40d 6.2/sparc/wu-ftpd-2.6.0-14.6x.sparc.rpm
These packages are GPG signed by Red Hat, Inc. for security. Our
key is available at:
http://www.redhat.com/corp/contact.html
You can verify each package with the following command:
rpm –checksig
If you only wish to verify that each package has not been
corrupted or tampered with, examine only the md5sum with the
following command:
rpm –checksig –nogpg
8. References:
N/A